sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <sys/proc.h>
  38 #include <netinet/sctp_var.h>
  39 #include <netinet/sctp_sysctl.h>
  40 #include <netinet/sctp_pcb.h>
  41 #include <netinet/sctputil.h>
  42 #include <netinet/sctp.h>
  43 #include <netinet/sctp_header.h>
  44 #include <netinet/sctp_asconf.h>
  45 #include <netinet/sctp_output.h>
  46 #include <netinet/sctp_timer.h>
  47 #include <netinet/sctp_bsd_addr.h>
  48 #include <netinet/sctp_dtrace_define.h>
  49 #if defined(INET) || defined(INET6)
  50 #include <netinet/udp.h>
  51 #endif
  52 #ifdef INET6
  53 #include <netinet6/ip6_var.h>
  54 #endif
  55 #include <sys/sched.h>
  56 #include <sys/smp.h>
  57 #include <sys/unistd.h>
  58
  59
  60 VNET_DEFINE(struct sctp_base_info, system_base_info);
  61
  62 /* FIX: we don't handle multiple link local scopes */
  63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  64 #ifdef INET6
  65 int
  66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  67 {
  68         struct sockaddr_in6 tmp_a, tmp_b;
  69
  70         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  71         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  72                 return (0);
  73         }
  74         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  75         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  76                 return (0);
  77         }
  78         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  79 }
  80 #endif
  81
  82 void
  83 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  84 {
  85         /*
  86          * We really don't need to lock this, but I will just because it
  87          * does not hurt.
  88          */
  89         SCTP_INP_INFO_RLOCK();
  90         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  91         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  92         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  93         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  94         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  95         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  96         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  97         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  98         SCTP_INP_INFO_RUNLOCK();
  99 }
 100
 101 /*-
 102  * Addresses are added to VRF's (Virtual Router's). For BSD we
 103  * have only the default VRF 0. We maintain a hash list of
 104  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 105  * these has a list of addresses. When we add a new address
 106  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 107  * not exist we create it and add it to the list of IFN's
 108  * within the VRF. Once we have the sctp_ifn, we add the
 109  * address to the list. So we look something like:
 110  *
 111  * hash-vrf-table
 112  *   vrf-> ifn-> ifn -> ifn
 113  *   vrf    |
 114  *    ...   +--ifa-> ifa -> ifa
 115  *   vrf
 116  *
 117  * We keep these separate lists since the SCTP subsystem will
 118  * point to these from its source address selection nets structure.
 119  * When an address is deleted it does not happen right away on
 120  * the SCTP side, it gets scheduled. What we do when a
 121  * delete happens is immediately remove the address from
 122  * the master list and decrement the refcount. As our
 123  * addip iterator works through and frees the src address
 124  * selection pointing to the sctp_ifa, eventually the refcount
 125  * will reach 0 and we will delete it. Note that it is assumed
 126  * that any locking on system level ifn/ifa is done at the
 127  * caller of these functions and these routines will only
 128  * lock the SCTP structures as they add or delete things.
 129  *
 130  * Other notes on VRF concepts.
 131  *  - An endpoint can be in multiple VRF's
 132  *  - An association lives within a VRF and only one VRF.
 133  *  - Any incoming packet we can deduce the VRF for by
 134  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 135  *  - Any downward send call or connect call must supply the
 136  *    VRF via ancillary data or via some sort of set default
 137  *    VRF socket option call (again for BSD no brainer since
 138  *    the VRF is always 0).
 139  *  - An endpoint may add multiple VRF's to it.
 140  *  - Listening sockets can accept associations in any
 141  *    of the VRF's they are in but the assoc will end up
 142  *    in only one VRF (gotten from the packet or connect/send).
 143  *
 144  */
 145
 146 struct sctp_vrf *
 147 sctp_allocate_vrf(int vrf_id)
 148 {
 149         struct sctp_vrf *vrf = NULL;
 150         struct sctp_vrflist *bucket;
 151
 152         /* First allocate the VRF structure */
 153         vrf = sctp_find_vrf(vrf_id);
 154         if (vrf) {
 155                 /* Already allocated */
 156                 return (vrf);
 157         }
 158         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 159             SCTP_M_VRF);
 160         if (vrf == NULL) {
 161                 /* No memory */
 162 #ifdef INVARIANTS
 163                 panic("No memory for VRF:%d", vrf_id);
 164 #endif
 165                 return (NULL);
 166         }
 167         /* setup the VRF */
 168         memset(vrf, 0, sizeof(struct sctp_vrf));
 169         vrf->vrf_id = vrf_id;
 170         LIST_INIT(&vrf->ifnlist);
 171         vrf->total_ifa_count = 0;
 172         vrf->refcount = 0;
 173         /* now also setup table ids */
 174         SCTP_INIT_VRF_TABLEID(vrf);
 175         /* Init the HASH of addresses */
 176         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 177             &vrf->vrf_addr_hashmark);
 178         if (vrf->vrf_addr_hash == NULL) {
 179                 /* No memory */
 180 #ifdef INVARIANTS
 181                 panic("No memory for VRF:%d", vrf_id);
 182 #endif
 183                 SCTP_FREE(vrf, SCTP_M_VRF);
 184                 return (NULL);
 185         }
 186         /* Add it to the hash table */
 187         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 188         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 189         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 190         return (vrf);
 191 }
 192
 193
 194 struct sctp_ifn *
 195 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 196 {
 197         struct sctp_ifn *sctp_ifnp;
 198         struct sctp_ifnlist *hash_ifn_head;
 199
 200         /*
 201          * We assume the lock is held for the addresses if that's wrong
 202          * problems could occur :-)
 203          */
 204         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 205         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 206                 if (sctp_ifnp->ifn_index == ifn_index) {
 207                         return (sctp_ifnp);
 208                 }
 209                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 210                         return (sctp_ifnp);
 211                 }
 212         }
 213         return (NULL);
 214 }
 215
 216
 217 struct sctp_vrf *
 218 sctp_find_vrf(uint32_t vrf_id)
 219 {
 220         struct sctp_vrflist *bucket;
 221         struct sctp_vrf *liste;
 222
 223         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 224         LIST_FOREACH(liste, bucket, next_vrf) {
 225                 if (vrf_id == liste->vrf_id) {
 226                         return (liste);
 227                 }
 228         }
 229         return (NULL);
 230 }
 231
 232
 233 void
 234 sctp_free_vrf(struct sctp_vrf *vrf)
 235 {
 236         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 237                 if (vrf->vrf_addr_hash) {
 238                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 239                         vrf->vrf_addr_hash = NULL;
 240                 }
 241                 /* We zero'd the count */
 242                 LIST_REMOVE(vrf, next_vrf);
 243                 SCTP_FREE(vrf, SCTP_M_VRF);
 244                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 245         }
 246 }
 247
 248
 249 void
 250 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 251 {
 252         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 253                 /* We zero'd the count */
 254                 if (sctp_ifnp->vrf) {
 255                         sctp_free_vrf(sctp_ifnp->vrf);
 256                 }
 257                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 258                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 259         }
 260 }
 261
 262
 263 void
 264 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 265 {
 266         struct sctp_ifn *sctp_ifnp;
 267
 268         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 269         if (sctp_ifnp != NULL) {
 270                 sctp_ifnp->ifn_mtu = mtu;
 271         }
 272 }
 273
 274
 275 void
 276 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 277 {
 278         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 279                 /* We zero'd the count */
 280                 if (sctp_ifap->ifn_p) {
 281                         sctp_free_ifn(sctp_ifap->ifn_p);
 282                 }
 283                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 284                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 285         }
 286 }
 287
 288
 289 static void
 290 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 291 {
 292         struct sctp_ifn *found;
 293
 294         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 295         if (found == NULL) {
 296                 /* Not in the list.. sorry */
 297                 return;
 298         }
 299         if (hold_addr_lock == 0)
 300                 SCTP_IPI_ADDR_WLOCK();
 301         LIST_REMOVE(sctp_ifnp, next_bucket);
 302         LIST_REMOVE(sctp_ifnp, next_ifn);
 303         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 304             sctp_ifnp->registered_af);
 305         if (hold_addr_lock == 0)
 306                 SCTP_IPI_ADDR_WUNLOCK();
 307         /* Take away the reference, and possibly free it */
 308         sctp_free_ifn(sctp_ifnp);
 309 }
 310
 311
 312 void
 313 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 314     const char *if_name, uint32_t ifn_index)
 315 {
 316         struct sctp_vrf *vrf;
 317         struct sctp_ifa *sctp_ifap;
 318
 319         SCTP_IPI_ADDR_RLOCK();
 320         vrf = sctp_find_vrf(vrf_id);
 321         if (vrf == NULL) {
 322                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 323                 goto out;
 324
 325         }
 326         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 327         if (sctp_ifap == NULL) {
 328                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 329                 goto out;
 330         }
 331         if (sctp_ifap->ifn_p == NULL) {
 332                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 333                 goto out;
 334         }
 335         if (if_name) {
 336                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 337                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 338                             sctp_ifap->ifn_p->ifn_name, if_name);
 339                         goto out;
 340                 }
 341         } else {
 342                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 343                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 344                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 345                         goto out;
 346                 }
 347         }
 348
 349         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 350         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 351 out:
 352         SCTP_IPI_ADDR_RUNLOCK();
 353 }
 354
 355
 356 void
 357 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 358     const char *if_name, uint32_t ifn_index)
 359 {
 360         struct sctp_vrf *vrf;
 361         struct sctp_ifa *sctp_ifap;
 362
 363         SCTP_IPI_ADDR_RLOCK();
 364         vrf = sctp_find_vrf(vrf_id);
 365         if (vrf == NULL) {
 366                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 367                 goto out;
 368
 369         }
 370         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 371         if (sctp_ifap == NULL) {
 372                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 373                 goto out;
 374         }
 375         if (sctp_ifap->ifn_p == NULL) {
 376                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 377                 goto out;
 378         }
 379         if (if_name) {
 380                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 381                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 382                             sctp_ifap->ifn_p->ifn_name, if_name);
 383                         goto out;
 384                 }
 385         } else {
 386                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 387                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 388                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 389                         goto out;
 390                 }
 391         }
 392
 393         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 394         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 395 out:
 396         SCTP_IPI_ADDR_RUNLOCK();
 397 }
 398
 399
 400 /*-
 401  * Add an ifa to an ifn.
 402  * Register the interface as necessary.
 403  * NOTE: ADDR write lock MUST be held.
 404  */
 405 static void
 406 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 407 {
 408         int ifa_af;
 409
 410         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 411         sctp_ifap->ifn_p = sctp_ifnp;
 412         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 413         /* update address counts */
 414         sctp_ifnp->ifa_count++;
 415         ifa_af = sctp_ifap->address.sa.sa_family;
 416         switch (ifa_af) {
 417 #ifdef INET
 418         case AF_INET:
 419                 sctp_ifnp->num_v4++;
 420                 break;
 421 #endif
 422 #ifdef INET6
 423         case AF_INET6:
 424                 sctp_ifnp->num_v6++;
 425                 break;
 426 #endif
 427         default:
 428                 break;
 429         }
 430         if (sctp_ifnp->ifa_count == 1) {
 431                 /* register the new interface */
 432                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 433                 sctp_ifnp->registered_af = ifa_af;
 434         }
 435 }
 436
 437
 438 /*-
 439  * Remove an ifa from its ifn.
 440  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 441  * the interface based on the remaining address families left.
 442  * NOTE: ADDR write lock MUST be held.
 443  */
 444 static void
 445 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 446 {
 447         LIST_REMOVE(sctp_ifap, next_ifa);
 448         if (sctp_ifap->ifn_p) {
 449                 /* update address counts */
 450                 sctp_ifap->ifn_p->ifa_count--;
 451                 switch (sctp_ifap->address.sa.sa_family) {
 452 #ifdef INET
 453                 case AF_INET:
 454                         sctp_ifap->ifn_p->num_v4--;
 455                         break;
 456 #endif
 457 #ifdef INET6
 458                 case AF_INET6:
 459                         sctp_ifap->ifn_p->num_v6--;
 460                         break;
 461 #endif
 462                 default:
 463                         break;
 464                 }
 465
 466                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 467                         /* remove the ifn, possibly freeing it */
 468                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 469                 } else {
 470                         /* re-register address family type, if needed */
 471                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 472                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 473                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 474                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 475                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 476                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 477                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 478                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 479                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 480                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 481                         }
 482                         /* free the ifn refcount */
 483                         sctp_free_ifn(sctp_ifap->ifn_p);
 484                 }
 485                 sctp_ifap->ifn_p = NULL;
 486         }
 487 }
 488
 489
 490 struct sctp_ifa *
 491 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 492     uint32_t ifn_type, const char *if_name, void *ifa,
 493     struct sockaddr *addr, uint32_t ifa_flags,
 494     int dynamic_add)
 495 {
 496         struct sctp_vrf *vrf;
 497         struct sctp_ifn *sctp_ifnp = NULL;
 498         struct sctp_ifa *sctp_ifap = NULL;
 499         struct sctp_ifalist *hash_addr_head;
 500         struct sctp_ifnlist *hash_ifn_head;
 501         uint32_t hash_of_addr;
 502         int new_ifn_af = 0;
 503
 504 #ifdef SCTP_DEBUG
 505         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 506         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 507 #endif
 508         SCTP_IPI_ADDR_WLOCK();
 509         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 510         if (sctp_ifnp) {
 511                 vrf = sctp_ifnp->vrf;
 512         } else {
 513                 vrf = sctp_find_vrf(vrf_id);
 514                 if (vrf == NULL) {
 515                         vrf = sctp_allocate_vrf(vrf_id);
 516                         if (vrf == NULL) {
 517                                 SCTP_IPI_ADDR_WUNLOCK();
 518                                 return (NULL);
 519                         }
 520                 }
 521         }
 522         if (sctp_ifnp == NULL) {
 523                 /*
 524                  * build one and add it, can't hold lock until after malloc
 525                  * done though.
 526                  */
 527                 SCTP_IPI_ADDR_WUNLOCK();
 528                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 529                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 530                 if (sctp_ifnp == NULL) {
 531 #ifdef INVARIANTS
 532                         panic("No memory for IFN");
 533 #endif
 534                         return (NULL);
 535                 }
 536                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 537                 sctp_ifnp->ifn_index = ifn_index;
 538                 sctp_ifnp->ifn_p = ifn;
 539                 sctp_ifnp->ifn_type = ifn_type;
 540                 sctp_ifnp->refcount = 0;
 541                 sctp_ifnp->vrf = vrf;
 542                 atomic_add_int(&vrf->refcount, 1);
 543                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 544                 if (if_name != NULL) {
 545                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 546                 } else {
 547                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 548                 }
 549                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 550                 LIST_INIT(&sctp_ifnp->ifalist);
 551                 SCTP_IPI_ADDR_WLOCK();
 552                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 553                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 554                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 555                 new_ifn_af = 1;
 556         }
 557         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 558         if (sctp_ifap) {
 559                 /* Hmm, it already exists? */
 560                 if ((sctp_ifap->ifn_p) &&
 561                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 562                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 563                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 564                             (void *)sctp_ifap);
 565                         if (new_ifn_af) {
 566                                 /* Remove the created one that we don't want */
 567                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 568                         }
 569                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 570                                 /* easy to solve, just switch back to active */
 571                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 572                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 573                                 sctp_ifap->ifn_p = sctp_ifnp;
 574                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 575                         }
 576         exit_stage_left:
 577                         SCTP_IPI_ADDR_WUNLOCK();
 578                         return (sctp_ifap);
 579                 } else {
 580                         if (sctp_ifap->ifn_p) {
 581                                 /*
 582                                  * The last IFN gets the address, remove the
 583                                  * old one
 584                                  */
 585                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 586                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 587                                     sctp_ifap->ifn_p->ifn_index, if_name,
 588                                     ifn_index);
 589                                 /* remove the address from the old ifn */
 590                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 591                                 /* move the address over to the new ifn */
 592                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 593                                 goto exit_stage_left;
 594                         } else {
 595                                 /* repair ifnp which was NULL ? */
 596                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 597                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 598                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 599                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 600                         }
 601                         goto exit_stage_left;
 602                 }
 603         }
 604         SCTP_IPI_ADDR_WUNLOCK();
 605         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 606         if (sctp_ifap == NULL) {
 607 #ifdef INVARIANTS
 608                 panic("No memory for IFA");
 609 #endif
 610                 return (NULL);
 611         }
 612         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 613         sctp_ifap->ifn_p = sctp_ifnp;
 614         atomic_add_int(&sctp_ifnp->refcount, 1);
 615         sctp_ifap->vrf_id = vrf_id;
 616         sctp_ifap->ifa = ifa;
 617         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 618         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 619         sctp_ifap->flags = ifa_flags;
 620         /* Set scope */
 621         switch (sctp_ifap->address.sa.sa_family) {
 622 #ifdef INET
 623         case AF_INET:
 624                 {
 625                         struct sockaddr_in *sin;
 626
 627                         sin = &sctp_ifap->address.sin;
 628                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 629                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 630                                 sctp_ifap->src_is_loop = 1;
 631                         }
 632                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 633                                 sctp_ifap->src_is_priv = 1;
 634                         }
 635                         sctp_ifnp->num_v4++;
 636                         if (new_ifn_af)
 637                                 new_ifn_af = AF_INET;
 638                         break;
 639                 }
 640 #endif
 641 #ifdef INET6
 642         case AF_INET6:
 643                 {
 644                         /* ok to use deprecated addresses? */
 645                         struct sockaddr_in6 *sin6;
 646
 647                         sin6 = &sctp_ifap->address.sin6;
 648                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 649                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 650                                 sctp_ifap->src_is_loop = 1;
 651                         }
 652                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 653                                 sctp_ifap->src_is_priv = 1;
 654                         }
 655                         sctp_ifnp->num_v6++;
 656                         if (new_ifn_af)
 657                                 new_ifn_af = AF_INET6;
 658                         break;
 659                 }
 660 #endif
 661         default:
 662                 new_ifn_af = 0;
 663                 break;
 664         }
 665         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 666
 667         if ((sctp_ifap->src_is_priv == 0) &&
 668             (sctp_ifap->src_is_loop == 0)) {
 669                 sctp_ifap->src_is_glob = 1;
 670         }
 671         SCTP_IPI_ADDR_WLOCK();
 672         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 673         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 674         sctp_ifap->refcount = 1;
 675         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 676         sctp_ifnp->ifa_count++;
 677         vrf->total_ifa_count++;
 678         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 679         if (new_ifn_af) {
 680                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 681                 sctp_ifnp->registered_af = new_ifn_af;
 682         }
 683         SCTP_IPI_ADDR_WUNLOCK();
 684         if (dynamic_add) {
 685                 /*
 686                  * Bump up the refcount so that when the timer completes it
 687                  * will drop back down.
 688                  */
 689                 struct sctp_laddr *wi;
 690
 691                 atomic_add_int(&sctp_ifap->refcount, 1);
 692                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 693                 if (wi == NULL) {
 694                         /*
 695                          * Gak, what can we do? We have lost an address
 696                          * change can you say HOSED?
 697                          */
 698                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 699                         /* Opps, must decrement the count */
 700                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 701                             if_name);
 702                         return (NULL);
 703                 }
 704                 SCTP_INCR_LADDR_COUNT();
 705                 bzero(wi, sizeof(*wi));
 706                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 707                 wi->ifa = sctp_ifap;
 708                 wi->action = SCTP_ADD_IP_ADDRESS;
 709
 710                 SCTP_WQ_ADDR_LOCK();
 711                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 712                 SCTP_WQ_ADDR_UNLOCK();
 713
 714                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 715                     (struct sctp_inpcb *)NULL,
 716                     (struct sctp_tcb *)NULL,
 717                     (struct sctp_nets *)NULL);
 718         } else {
 719                 /* it's ready for use */
 720                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 721         }
 722         return (sctp_ifap);
 723 }
 724
 725 void
 726 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 727     uint32_t ifn_index, const char *if_name)
 728 {
 729         struct sctp_vrf *vrf;
 730         struct sctp_ifa *sctp_ifap = NULL;
 731
 732         SCTP_IPI_ADDR_WLOCK();
 733         vrf = sctp_find_vrf(vrf_id);
 734         if (vrf == NULL) {
 735                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 736                 goto out_now;
 737         }
 738 #ifdef SCTP_DEBUG
 739         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 740         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 741 #endif
 742         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 743         if (sctp_ifap) {
 744                 /* Validate the delete */
 745                 if (sctp_ifap->ifn_p) {
 746                         int valid = 0;
 747
 748                         /*-
 749                          * The name has priority over the ifn_index
 750                          * if its given. We do this especially for
 751                          * panda who might recycle indexes fast.
 752                          */
 753                         if (if_name) {
 754                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 755                                         /* They match its a correct delete */
 756                                         valid = 1;
 757                                 }
 758                         }
 759                         if (!valid) {
 760                                 /* last ditch check ifn_index */
 761                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 762                                         valid = 1;
 763                                 }
 764                         }
 765                         if (!valid) {
 766                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 767                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 768                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 769                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 770                                 SCTP_IPI_ADDR_WUNLOCK();
 771                                 return;
 772                         }
 773                 }
 774                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 775                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 776                 /*
 777                  * We don't set the flag. This means that the structure will
 778                  * hang around in EP's that have bound specific to it until
 779                  * they close. This gives us TCP like behavior if someone
 780                  * removes an address (or for that matter adds it right
 781                  * back).
 782                  */
 783                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 784                 vrf->total_ifa_count--;
 785                 LIST_REMOVE(sctp_ifap, next_bucket);
 786                 sctp_remove_ifa_from_ifn(sctp_ifap);
 787         }
 788 #ifdef SCTP_DEBUG
 789         else {
 790                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 791                     ifn_index);
 792                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 793         }
 794 #endif
 795
 796 out_now:
 797         SCTP_IPI_ADDR_WUNLOCK();
 798         if (sctp_ifap) {
 799                 struct sctp_laddr *wi;
 800
 801                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 802                 if (wi == NULL) {
 803                         /*
 804                          * Gak, what can we do? We have lost an address
 805                          * change can you say HOSED?
 806                          */
 807                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 808
 809                         /* Oops, must decrement the count */
 810                         sctp_free_ifa(sctp_ifap);
 811                         return;
 812                 }
 813                 SCTP_INCR_LADDR_COUNT();
 814                 bzero(wi, sizeof(*wi));
 815                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 816                 wi->ifa = sctp_ifap;
 817                 wi->action = SCTP_DEL_IP_ADDRESS;
 818                 SCTP_WQ_ADDR_LOCK();
 819                 /*
 820                  * Should this really be a tailq? As it is we will process
 821                  * the newest first :-0
 822                  */
 823                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 824                 SCTP_WQ_ADDR_UNLOCK();
 825
 826                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 827                     (struct sctp_inpcb *)NULL,
 828                     (struct sctp_tcb *)NULL,
 829                     (struct sctp_nets *)NULL);
 830         }
 831         return;
 832 }
 833
 834
 835 static int
 836 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 837 {
 838         int loopback_scope;
 839 #if defined(INET)
 840         int ipv4_local_scope, ipv4_addr_legal;
 841 #endif
 842 #if defined(INET6)
 843         int local_scope, site_scope, ipv6_addr_legal;
 844 #endif
 845         struct sctp_vrf *vrf;
 846         struct sctp_ifn *sctp_ifn;
 847         struct sctp_ifa *sctp_ifa;
 848
 849         loopback_scope = stcb->asoc.scope.loopback_scope;
 850 #if defined(INET)
 851         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 852         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 853 #endif
 854 #if defined(INET6)
 855         local_scope = stcb->asoc.scope.local_scope;
 856         site_scope = stcb->asoc.scope.site_scope;
 857         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 858 #endif
 859
 860         SCTP_IPI_ADDR_RLOCK();
 861         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 862         if (vrf == NULL) {
 863                 /* no vrf, no addresses */
 864                 SCTP_IPI_ADDR_RUNLOCK();
 865                 return (0);
 866         }
 867         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 868                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 869                         if ((loopback_scope == 0) &&
 870                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 871                                 continue;
 872                         }
 873                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 874                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 875                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 876                                         /*
 877                                          * We allow pending addresses, where
 878                                          * we have sent an asconf-add to be
 879                                          * considered valid.
 880                                          */
 881                                         continue;
 882                                 }
 883                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 884                                         continue;
 885                                 }
 886                                 switch (sctp_ifa->address.sa.sa_family) {
 887 #ifdef INET
 888                                 case AF_INET:
 889                                         if (ipv4_addr_legal) {
 890                                                 struct sockaddr_in *sin,
 891                                                            *rsin;
 892
 893                                                 sin = &sctp_ifa->address.sin;
 894                                                 rsin = (struct sockaddr_in *)to;
 895                                                 if ((ipv4_local_scope == 0) &&
 896                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 897                                                         continue;
 898                                                 }
 899                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 900                                                     &sin->sin_addr) != 0) {
 901                                                         continue;
 902                                                 }
 903                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 904                                                         SCTP_IPI_ADDR_RUNLOCK();
 905                                                         return (1);
 906                                                 }
 907                                         }
 908                                         break;
 909 #endif
 910 #ifdef INET6
 911                                 case AF_INET6:
 912                                         if (ipv6_addr_legal) {
 913                                                 struct sockaddr_in6 *sin6,
 914                                                             *rsin6;
 915
 916                                                 sin6 = &sctp_ifa->address.sin6;
 917                                                 rsin6 = (struct sockaddr_in6 *)to;
 918                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 919                                                     &sin6->sin6_addr) != 0) {
 920                                                         continue;
 921                                                 }
 922                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 923                                                         if (local_scope == 0)
 924                                                                 continue;
 925                                                         if (sin6->sin6_scope_id == 0) {
 926                                                                 if (sa6_recoverscope(sin6) != 0)
 927                                                                         continue;
 928                                                         }
 929                                                 }
 930                                                 if ((site_scope == 0) &&
 931                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 932                                                         continue;
 933                                                 }
 934                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 935                                                         SCTP_IPI_ADDR_RUNLOCK();
 936                                                         return (1);
 937                                                 }
 938                                         }
 939                                         break;
 940 #endif
 941                                 default:
 942                                         /* TSNH */
 943                                         break;
 944                                 }
 945                         }
 946                 }
 947         } else {
 948                 struct sctp_laddr *laddr;
 949
 950                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 951                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 952                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 953                                 continue;
 954                         }
 955                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 956                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 957                                 /*
 958                                  * We allow pending addresses, where we have
 959                                  * sent an asconf-add to be considered
 960                                  * valid.
 961                                  */
 962                                 continue;
 963                         }
 964                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 965                                 continue;
 966                         }
 967                         switch (to->sa_family) {
 968 #ifdef INET
 969                         case AF_INET:
 970                                 {
 971                                         struct sockaddr_in *sin, *rsin;
 972
 973                                         sin = &laddr->ifa->address.sin;
 974                                         rsin = (struct sockaddr_in *)to;
 975                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 976                                                 SCTP_IPI_ADDR_RUNLOCK();
 977                                                 return (1);
 978                                         }
 979                                         break;
 980                                 }
 981 #endif
 982 #ifdef INET6
 983                         case AF_INET6:
 984                                 {
 985                                         struct sockaddr_in6 *sin6, *rsin6;
 986
 987                                         sin6 = &laddr->ifa->address.sin6;
 988                                         rsin6 = (struct sockaddr_in6 *)to;
 989                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 990                                                 SCTP_IPI_ADDR_RUNLOCK();
 991                                                 return (1);
 992                                         }
 993                                         break;
 994                                 }
 995
 996 #endif
 997                         default:
 998                                 /* TSNH */
 999                                 break;
1000                         }
1001
1002                 }
1003         }
1004         SCTP_IPI_ADDR_RUNLOCK();
1005         return (0);
1006 }
1007
1008
1009 static struct sctp_tcb *
1010 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1011     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1012 {
1013         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1014         /*
1015          * If we support the TCP model, then we must now dig through to see
1016          * if we can find our endpoint in the list of tcp ep's.
1017          */
1018         uint16_t lport, rport;
1019         struct sctppcbhead *ephead;
1020         struct sctp_inpcb *inp;
1021         struct sctp_laddr *laddr;
1022         struct sctp_tcb *stcb;
1023         struct sctp_nets *net;
1024
1025         if ((to == NULL) || (from == NULL)) {
1026                 return (NULL);
1027         }
1028         switch (to->sa_family) {
1029 #ifdef INET
1030         case AF_INET:
1031                 if (from->sa_family == AF_INET) {
1032                         lport = ((struct sockaddr_in *)to)->sin_port;
1033                         rport = ((struct sockaddr_in *)from)->sin_port;
1034                 } else {
1035                         return (NULL);
1036                 }
1037                 break;
1038 #endif
1039 #ifdef INET6
1040         case AF_INET6:
1041                 if (from->sa_family == AF_INET6) {
1042                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1043                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1044                 } else {
1045                         return (NULL);
1046                 }
1047                 break;
1048 #endif
1049         default:
1050                 return (NULL);
1051         }
1052         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1053         /*
1054          * Ok now for each of the guys in this bucket we must look and see:
1055          * - Does the remote port match. - Does there single association's
1056          * addresses match this address (to). If so we update p_ep to point
1057          * to this ep and return the tcb from it.
1058          */
1059         LIST_FOREACH(inp, ephead, sctp_hash) {
1060                 SCTP_INP_RLOCK(inp);
1061                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1062                         SCTP_INP_RUNLOCK(inp);
1063                         continue;
1064                 }
1065                 if (lport != inp->sctp_lport) {
1066                         SCTP_INP_RUNLOCK(inp);
1067                         continue;
1068                 }
1069                 switch (to->sa_family) {
1070 #ifdef INET
1071                 case AF_INET:
1072                         {
1073                                 struct sockaddr_in *sin;
1074
1075                                 sin = (struct sockaddr_in *)to;
1076                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1077                                     &sin->sin_addr) != 0) {
1078                                         SCTP_INP_RUNLOCK(inp);
1079                                         continue;
1080                                 }
1081                                 break;
1082                         }
1083 #endif
1084 #ifdef INET6
1085                 case AF_INET6:
1086                         {
1087                                 struct sockaddr_in6 *sin6;
1088
1089                                 sin6 = (struct sockaddr_in6 *)to;
1090                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1091                                     &sin6->sin6_addr) != 0) {
1092                                         SCTP_INP_RUNLOCK(inp);
1093                                         continue;
1094                                 }
1095                                 break;
1096                         }
1097 #endif
1098                 default:
1099                         SCTP_INP_RUNLOCK(inp);
1100                         continue;
1101                 }
1102                 if (inp->def_vrf_id != vrf_id) {
1103                         SCTP_INP_RUNLOCK(inp);
1104                         continue;
1105                 }
1106                 /* check to see if the ep has one of the addresses */
1107                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1108                         /* We are NOT bound all, so look further */
1109                         int match = 0;
1110
1111                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1112
1113                                 if (laddr->ifa == NULL) {
1114                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1115                                         continue;
1116                                 }
1117                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1118                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1119                                         continue;
1120                                 }
1121                                 if (laddr->ifa->address.sa.sa_family ==
1122                                     to->sa_family) {
1123                                         /* see if it matches */
1124 #ifdef INET
1125                                         if (from->sa_family == AF_INET) {
1126                                                 struct sockaddr_in *intf_addr,
1127                                                            *sin;
1128
1129                                                 intf_addr = &laddr->ifa->address.sin;
1130                                                 sin = (struct sockaddr_in *)to;
1131                                                 if (sin->sin_addr.s_addr ==
1132                                                     intf_addr->sin_addr.s_addr) {
1133                                                         match = 1;
1134                                                         break;
1135                                                 }
1136                                         }
1137 #endif
1138 #ifdef INET6
1139                                         if (from->sa_family == AF_INET6) {
1140                                                 struct sockaddr_in6 *intf_addr6;
1141                                                 struct sockaddr_in6 *sin6;
1142
1143                                                 sin6 = (struct sockaddr_in6 *)
1144                                                     to;
1145                                                 intf_addr6 = &laddr->ifa->address.sin6;
1146
1147                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1148                                                     intf_addr6)) {
1149                                                         match = 1;
1150                                                         break;
1151                                                 }
1152                                         }
1153 #endif
1154                                 }
1155                         }
1156                         if (match == 0) {
1157                                 /* This endpoint does not have this address */
1158                                 SCTP_INP_RUNLOCK(inp);
1159                                 continue;
1160                         }
1161                 }
1162                 /*
1163                  * Ok if we hit here the ep has the address, does it hold
1164                  * the tcb?
1165                  */
1166                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1167                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1168                 if (stcb == NULL) {
1169                         SCTP_INP_RUNLOCK(inp);
1170                         continue;
1171                 }
1172                 SCTP_TCB_LOCK(stcb);
1173                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1174                         SCTP_TCB_UNLOCK(stcb);
1175                         SCTP_INP_RUNLOCK(inp);
1176                         continue;
1177                 }
1178                 if (stcb->rport != rport) {
1179                         /* remote port does not match. */
1180                         SCTP_TCB_UNLOCK(stcb);
1181                         SCTP_INP_RUNLOCK(inp);
1182                         continue;
1183                 }
1184                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1185                         SCTP_TCB_UNLOCK(stcb);
1186                         SCTP_INP_RUNLOCK(inp);
1187                         continue;
1188                 }
1189                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1190                         SCTP_TCB_UNLOCK(stcb);
1191                         SCTP_INP_RUNLOCK(inp);
1192                         continue;
1193                 }
1194                 /* Does this TCB have a matching address? */
1195                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1196
1197                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1198                                 /* not the same family, can't be a match */
1199                                 continue;
1200                         }
1201                         switch (from->sa_family) {
1202 #ifdef INET
1203                         case AF_INET:
1204                                 {
1205                                         struct sockaddr_in *sin, *rsin;
1206
1207                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1208                                         rsin = (struct sockaddr_in *)from;
1209                                         if (sin->sin_addr.s_addr ==
1210                                             rsin->sin_addr.s_addr) {
1211                                                 /* found it */
1212                                                 if (netp != NULL) {
1213                                                         *netp = net;
1214                                                 }
1215                                                 /*
1216                                                  * Update the endpoint
1217                                                  * pointer
1218                                                  */
1219                                                 *inp_p = inp;
1220                                                 SCTP_INP_RUNLOCK(inp);
1221                                                 return (stcb);
1222                                         }
1223                                         break;
1224                                 }
1225 #endif
1226 #ifdef INET6
1227                         case AF_INET6:
1228                                 {
1229                                         struct sockaddr_in6 *sin6, *rsin6;
1230
1231                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1232                                         rsin6 = (struct sockaddr_in6 *)from;
1233                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1234                                             rsin6)) {
1235                                                 /* found it */
1236                                                 if (netp != NULL) {
1237                                                         *netp = net;
1238                                                 }
1239                                                 /*
1240                                                  * Update the endpoint
1241                                                  * pointer
1242                                                  */
1243                                                 *inp_p = inp;
1244                                                 SCTP_INP_RUNLOCK(inp);
1245                                                 return (stcb);
1246                                         }
1247                                         break;
1248                                 }
1249 #endif
1250                         default:
1251                                 /* TSNH */
1252                                 break;
1253                         }
1254                 }
1255                 SCTP_TCB_UNLOCK(stcb);
1256                 SCTP_INP_RUNLOCK(inp);
1257         }
1258         return (NULL);
1259 }
1260
1261
1262 /*
1263  * rules for use
1264  *
1265  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1266  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1267  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1268  * NULL.
1269  */
1270
1271 struct sctp_tcb *
1272 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1273     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1274 {
1275         struct sctpasochead *head;
1276         struct sctp_inpcb *inp;
1277         struct sctp_tcb *stcb = NULL;
1278         struct sctp_nets *net;
1279         uint16_t rport;
1280
1281         inp = *inp_p;
1282         switch (remote->sa_family) {
1283 #ifdef INET
1284         case AF_INET:
1285                 rport = (((struct sockaddr_in *)remote)->sin_port);
1286                 break;
1287 #endif
1288 #ifdef INET6
1289         case AF_INET6:
1290                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1291                 break;
1292 #endif
1293         default:
1294                 return (NULL);
1295         }
1296         if (locked_tcb) {
1297                 /*
1298                  * UN-lock so we can do proper locking here this occurs when
1299                  * called from load_addresses_from_init.
1300                  */
1301                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1302                 SCTP_TCB_UNLOCK(locked_tcb);
1303         }
1304         SCTP_INP_INFO_RLOCK();
1305         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1306             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1307                 /*-
1308                  * Now either this guy is our listener or it's the
1309                  * connector. If it is the one that issued the connect, then
1310                  * it's only chance is to be the first TCB in the list. If
1311                  * it is the acceptor, then do the special_lookup to hash
1312                  * and find the real inp.
1313                  */
1314                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1315                         /* to is peer addr, from is my addr */
1316                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1317                             netp, inp->def_vrf_id);
1318                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1319                                 /* we have a locked tcb, lower refcount */
1320                                 SCTP_INP_DECR_REF(inp);
1321                         }
1322                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1323                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1324                                 SCTP_TCB_LOCK(locked_tcb);
1325                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1326                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1327                         }
1328                         SCTP_INP_INFO_RUNLOCK();
1329                         return (stcb);
1330                 } else {
1331                         SCTP_INP_WLOCK(inp);
1332                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1333                                 goto null_return;
1334                         }
1335                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1336                         if (stcb == NULL) {
1337                                 goto null_return;
1338                         }
1339                         SCTP_TCB_LOCK(stcb);
1340
1341                         if (stcb->rport != rport) {
1342                                 /* remote port does not match. */
1343                                 SCTP_TCB_UNLOCK(stcb);
1344                                 goto null_return;
1345                         }
1346                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1347                                 SCTP_TCB_UNLOCK(stcb);
1348                                 goto null_return;
1349                         }
1350                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1351                                 SCTP_TCB_UNLOCK(stcb);
1352                                 goto null_return;
1353                         }
1354                         /* now look at the list of remote addresses */
1355                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1356 #ifdef INVARIANTS
1357                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1358                                         panic("Corrupt net list");
1359                                 }
1360 #endif
1361                                 if (net->ro._l_addr.sa.sa_family !=
1362                                     remote->sa_family) {
1363                                         /* not the same family */
1364                                         continue;
1365                                 }
1366                                 switch (remote->sa_family) {
1367 #ifdef INET
1368                                 case AF_INET:
1369                                         {
1370                                                 struct sockaddr_in *sin,
1371                                                            *rsin;
1372
1373                                                 sin = (struct sockaddr_in *)
1374                                                     &net->ro._l_addr;
1375                                                 rsin = (struct sockaddr_in *)remote;
1376                                                 if (sin->sin_addr.s_addr ==
1377                                                     rsin->sin_addr.s_addr) {
1378                                                         /* found it */
1379                                                         if (netp != NULL) {
1380                                                                 *netp = net;
1381                                                         }
1382                                                         if (locked_tcb == NULL) {
1383                                                                 SCTP_INP_DECR_REF(inp);
1384                                                         } else if (locked_tcb != stcb) {
1385                                                                 SCTP_TCB_LOCK(locked_tcb);
1386                                                         }
1387                                                         if (locked_tcb) {
1388                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1389                                                         }
1390                                                         SCTP_INP_WUNLOCK(inp);
1391                                                         SCTP_INP_INFO_RUNLOCK();
1392                                                         return (stcb);
1393                                                 }
1394                                                 break;
1395                                         }
1396 #endif
1397 #ifdef INET6
1398                                 case AF_INET6:
1399                                         {
1400                                                 struct sockaddr_in6 *sin6,
1401                                                             *rsin6;
1402
1403                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1404                                                 rsin6 = (struct sockaddr_in6 *)remote;
1405                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1406                                                     rsin6)) {
1407                                                         /* found it */
1408                                                         if (netp != NULL) {
1409                                                                 *netp = net;
1410                                                         }
1411                                                         if (locked_tcb == NULL) {
1412                                                                 SCTP_INP_DECR_REF(inp);
1413                                                         } else if (locked_tcb != stcb) {
1414                                                                 SCTP_TCB_LOCK(locked_tcb);
1415                                                         }
1416                                                         if (locked_tcb) {
1417                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1418                                                         }
1419                                                         SCTP_INP_WUNLOCK(inp);
1420                                                         SCTP_INP_INFO_RUNLOCK();
1421                                                         return (stcb);
1422                                                 }
1423                                                 break;
1424                                         }
1425 #endif
1426                                 default:
1427                                         /* TSNH */
1428                                         break;
1429                                 }
1430                         }
1431                         SCTP_TCB_UNLOCK(stcb);
1432                 }
1433         } else {
1434                 SCTP_INP_WLOCK(inp);
1435                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1436                         goto null_return;
1437                 }
1438                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1439                     inp->sctp_hashmark)];
1440                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1441                         if (stcb->rport != rport) {
1442                                 /* remote port does not match */
1443                                 continue;
1444                         }
1445                         SCTP_TCB_LOCK(stcb);
1446                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1447                                 SCTP_TCB_UNLOCK(stcb);
1448                                 continue;
1449                         }
1450                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1451                                 SCTP_TCB_UNLOCK(stcb);
1452                                 continue;
1453                         }
1454                         /* now look at the list of remote addresses */
1455                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1456 #ifdef INVARIANTS
1457                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1458                                         panic("Corrupt net list");
1459                                 }
1460 #endif
1461                                 if (net->ro._l_addr.sa.sa_family !=
1462                                     remote->sa_family) {
1463                                         /* not the same family */
1464                                         continue;
1465                                 }
1466                                 switch (remote->sa_family) {
1467 #ifdef INET
1468                                 case AF_INET:
1469                                         {
1470                                                 struct sockaddr_in *sin,
1471                                                            *rsin;
1472
1473                                                 sin = (struct sockaddr_in *)
1474                                                     &net->ro._l_addr;
1475                                                 rsin = (struct sockaddr_in *)remote;
1476                                                 if (sin->sin_addr.s_addr ==
1477                                                     rsin->sin_addr.s_addr) {
1478                                                         /* found it */
1479                                                         if (netp != NULL) {
1480                                                                 *netp = net;
1481                                                         }
1482                                                         if (locked_tcb == NULL) {
1483                                                                 SCTP_INP_DECR_REF(inp);
1484                                                         } else if (locked_tcb != stcb) {
1485                                                                 SCTP_TCB_LOCK(locked_tcb);
1486                                                         }
1487                                                         if (locked_tcb) {
1488                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1489                                                         }
1490                                                         SCTP_INP_WUNLOCK(inp);
1491                                                         SCTP_INP_INFO_RUNLOCK();
1492                                                         return (stcb);
1493                                                 }
1494                                                 break;
1495                                         }
1496 #endif
1497 #ifdef INET6
1498                                 case AF_INET6:
1499                                         {
1500                                                 struct sockaddr_in6 *sin6,
1501                                                             *rsin6;
1502
1503                                                 sin6 = (struct sockaddr_in6 *)
1504                                                     &net->ro._l_addr;
1505                                                 rsin6 = (struct sockaddr_in6 *)remote;
1506                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1507                                                     rsin6)) {
1508                                                         /* found it */
1509                                                         if (netp != NULL) {
1510                                                                 *netp = net;
1511                                                         }
1512                                                         if (locked_tcb == NULL) {
1513                                                                 SCTP_INP_DECR_REF(inp);
1514                                                         } else if (locked_tcb != stcb) {
1515                                                                 SCTP_TCB_LOCK(locked_tcb);
1516                                                         }
1517                                                         if (locked_tcb) {
1518                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1519                                                         }
1520                                                         SCTP_INP_WUNLOCK(inp);
1521                                                         SCTP_INP_INFO_RUNLOCK();
1522                                                         return (stcb);
1523                                                 }
1524                                                 break;
1525                                         }
1526 #endif
1527                                 default:
1528                                         /* TSNH */
1529                                         break;
1530                                 }
1531                         }
1532                         SCTP_TCB_UNLOCK(stcb);
1533                 }
1534         }
1535 null_return:
1536         /* clean up for returning null */
1537         if (locked_tcb) {
1538                 SCTP_TCB_LOCK(locked_tcb);
1539                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1540         }
1541         SCTP_INP_WUNLOCK(inp);
1542         SCTP_INP_INFO_RUNLOCK();
1543         /* not found */
1544         return (NULL);
1545 }
1546
1547
1548 /*
1549  * Find an association for a specific endpoint using the association id given
1550  * out in the COMM_UP notification
1551  */
1552 struct sctp_tcb *
1553 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1554 {
1555         /*
1556          * Use my the assoc_id to find a endpoint
1557          */
1558         struct sctpasochead *head;
1559         struct sctp_tcb *stcb;
1560         uint32_t id;
1561
1562         if (inp == NULL) {
1563                 SCTP_PRINTF("TSNH ep_associd\n");
1564                 return (NULL);
1565         }
1566         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1567                 SCTP_PRINTF("TSNH ep_associd0\n");
1568                 return (NULL);
1569         }
1570         id = (uint32_t)asoc_id;
1571         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1572         if (head == NULL) {
1573                 /* invalid id TSNH */
1574                 SCTP_PRINTF("TSNH ep_associd1\n");
1575                 return (NULL);
1576         }
1577         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1578                 if (stcb->asoc.assoc_id == id) {
1579                         if (inp != stcb->sctp_ep) {
1580                                 /*
1581                                  * some other guy has the same id active (id
1582                                  * collision ??).
1583                                  */
1584                                 SCTP_PRINTF("TSNH ep_associd2\n");
1585                                 continue;
1586                         }
1587                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1588                                 continue;
1589                         }
1590                         if (want_lock) {
1591                                 SCTP_TCB_LOCK(stcb);
1592                         }
1593                         return (stcb);
1594                 }
1595         }
1596         return (NULL);
1597 }
1598
1599
1600 struct sctp_tcb *
1601 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1602 {
1603         struct sctp_tcb *stcb;
1604
1605         SCTP_INP_RLOCK(inp);
1606         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1607         SCTP_INP_RUNLOCK(inp);
1608         return (stcb);
1609 }
1610
1611
1612 /*
1613  * Endpoint probe expects that the INP_INFO is locked.
1614  */
1615 static struct sctp_inpcb *
1616 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1617     uint16_t lport, uint32_t vrf_id)
1618 {
1619         struct sctp_inpcb *inp;
1620         struct sctp_laddr *laddr;
1621 #ifdef INET
1622         struct sockaddr_in *sin;
1623 #endif
1624 #ifdef INET6
1625         struct sockaddr_in6 *sin6;
1626         struct sockaddr_in6 *intf_addr6;
1627 #endif
1628         int fnd;
1629
1630 #ifdef INET
1631         sin = NULL;
1632 #endif
1633 #ifdef INET6
1634         sin6 = NULL;
1635 #endif
1636         switch (nam->sa_family) {
1637 #ifdef INET
1638         case AF_INET:
1639                 sin = (struct sockaddr_in *)nam;
1640                 break;
1641 #endif
1642 #ifdef INET6
1643         case AF_INET6:
1644                 sin6 = (struct sockaddr_in6 *)nam;
1645                 break;
1646 #endif
1647         default:
1648                 /* unsupported family */
1649                 return (NULL);
1650         }
1651
1652         if (head == NULL)
1653                 return (NULL);
1654
1655         LIST_FOREACH(inp, head, sctp_hash) {
1656                 SCTP_INP_RLOCK(inp);
1657                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1658                         SCTP_INP_RUNLOCK(inp);
1659                         continue;
1660                 }
1661                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1662                     (inp->sctp_lport == lport)) {
1663                         /* got it */
1664                         switch (nam->sa_family) {
1665 #ifdef INET
1666                         case AF_INET:
1667                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1668                                     SCTP_IPV6_V6ONLY(inp)) {
1669                                         /*
1670                                          * IPv4 on a IPv6 socket with ONLY
1671                                          * IPv6 set
1672                                          */
1673                                         SCTP_INP_RUNLOCK(inp);
1674                                         continue;
1675                                 }
1676                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1677                                     &sin->sin_addr) != 0) {
1678                                         SCTP_INP_RUNLOCK(inp);
1679                                         continue;
1680                                 }
1681                                 break;
1682 #endif
1683 #ifdef INET6
1684                         case AF_INET6:
1685                                 /*
1686                                  * A V6 address and the endpoint is NOT
1687                                  * bound V6
1688                                  */
1689                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1690                                         SCTP_INP_RUNLOCK(inp);
1691                                         continue;
1692                                 }
1693                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1694                                     &sin6->sin6_addr) != 0) {
1695                                         SCTP_INP_RUNLOCK(inp);
1696                                         continue;
1697                                 }
1698                                 break;
1699 #endif
1700                         default:
1701                                 break;
1702                         }
1703                         /* does a VRF id match? */
1704                         fnd = 0;
1705                         if (inp->def_vrf_id == vrf_id)
1706                                 fnd = 1;
1707
1708                         SCTP_INP_RUNLOCK(inp);
1709                         if (!fnd)
1710                                 continue;
1711                         return (inp);
1712                 }
1713                 SCTP_INP_RUNLOCK(inp);
1714         }
1715         switch (nam->sa_family) {
1716 #ifdef INET
1717         case AF_INET:
1718                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1719                         /* Can't hunt for one that has no address specified */
1720                         return (NULL);
1721                 }
1722                 break;
1723 #endif
1724 #ifdef INET6
1725         case AF_INET6:
1726                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1727                         /* Can't hunt for one that has no address specified */
1728                         return (NULL);
1729                 }
1730                 break;
1731 #endif
1732         default:
1733                 break;
1734         }
1735         /*
1736          * ok, not bound to all so see if we can find a EP bound to this
1737          * address.
1738          */
1739         LIST_FOREACH(inp, head, sctp_hash) {
1740                 SCTP_INP_RLOCK(inp);
1741                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1742                         SCTP_INP_RUNLOCK(inp);
1743                         continue;
1744                 }
1745                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1746                         SCTP_INP_RUNLOCK(inp);
1747                         continue;
1748                 }
1749                 /*
1750                  * Ok this could be a likely candidate, look at all of its
1751                  * addresses
1752                  */
1753                 if (inp->sctp_lport != lport) {
1754                         SCTP_INP_RUNLOCK(inp);
1755                         continue;
1756                 }
1757                 /* does a VRF id match? */
1758                 fnd = 0;
1759                 if (inp->def_vrf_id == vrf_id)
1760                         fnd = 1;
1761
1762                 if (!fnd) {
1763                         SCTP_INP_RUNLOCK(inp);
1764                         continue;
1765                 }
1766                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1767                         if (laddr->ifa == NULL) {
1768                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1769                                     __func__);
1770                                 continue;
1771                         }
1772                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1773                             (void *)laddr->ifa);
1774                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1775                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1776                                 continue;
1777                         }
1778                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1779                                 /* possible, see if it matches */
1780                                 switch (nam->sa_family) {
1781 #ifdef INET
1782                                 case AF_INET:
1783                                         if (sin->sin_addr.s_addr ==
1784                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1785                                                 SCTP_INP_RUNLOCK(inp);
1786                                                 return (inp);
1787                                         }
1788                                         break;
1789 #endif
1790 #ifdef INET6
1791                                 case AF_INET6:
1792                                         intf_addr6 = &laddr->ifa->address.sin6;
1793                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1794                                             intf_addr6)) {
1795                                                 SCTP_INP_RUNLOCK(inp);
1796                                                 return (inp);
1797                                         }
1798                                         break;
1799 #endif
1800                                 }
1801                         }
1802                 }
1803                 SCTP_INP_RUNLOCK(inp);
1804         }
1805         return (NULL);
1806 }
1807
1808
1809 static struct sctp_inpcb *
1810 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1811 {
1812         struct sctppcbhead *head;
1813         struct sctp_inpcb *t_inp;
1814         int fnd;
1815
1816         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1817             SCTP_BASE_INFO(hashmark))];
1818         LIST_FOREACH(t_inp, head, sctp_hash) {
1819                 if (t_inp->sctp_lport != lport) {
1820                         continue;
1821                 }
1822                 /* is it in the VRF in question */
1823                 fnd = 0;
1824                 if (t_inp->def_vrf_id == vrf_id)
1825                         fnd = 1;
1826                 if (!fnd)
1827                         continue;
1828
1829                 /* This one is in use. */
1830                 /* check the v6/v4 binding issue */
1831                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1832                     SCTP_IPV6_V6ONLY(t_inp)) {
1833                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1834                                 /* collision in V6 space */
1835                                 return (t_inp);
1836                         } else {
1837                                 /* inp is BOUND_V4 no conflict */
1838                                 continue;
1839                         }
1840                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1841                         /* t_inp is bound v4 and v6, conflict always */
1842                         return (t_inp);
1843                 } else {
1844                         /* t_inp is bound only V4 */
1845                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1846                             SCTP_IPV6_V6ONLY(inp)) {
1847                                 /* no conflict */
1848                                 continue;
1849                         }
1850                         /* else fall through to conflict */
1851                 }
1852                 return (t_inp);
1853         }
1854         return (NULL);
1855 }
1856
1857
1858 int
1859 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1860 {
1861         /* For 1-2-1 with port reuse */
1862         struct sctppcbhead *head;
1863         struct sctp_inpcb *tinp, *ninp;
1864
1865         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1866                 /* only works with port reuse on */
1867                 return (-1);
1868         }
1869         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1870                 return (0);
1871         }
1872         SCTP_INP_RUNLOCK(inp);
1873         SCTP_INP_INFO_WLOCK();
1874         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1875             SCTP_BASE_INFO(hashmark))];
1876         /* Kick out all non-listeners to the TCP hash */
1877         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1878                 if (tinp->sctp_lport != inp->sctp_lport) {
1879                         continue;
1880                 }
1881                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1882                         continue;
1883                 }
1884                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1885                         continue;
1886                 }
1887                 if (tinp->sctp_socket->so_qlimit) {
1888                         continue;
1889                 }
1890                 SCTP_INP_WLOCK(tinp);
1891                 LIST_REMOVE(tinp, sctp_hash);
1892                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1893                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1894                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1895                 SCTP_INP_WUNLOCK(tinp);
1896         }
1897         SCTP_INP_WLOCK(inp);
1898         /* Pull from where he was */
1899         LIST_REMOVE(inp, sctp_hash);
1900         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1901         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1902         LIST_INSERT_HEAD(head, inp, sctp_hash);
1903         SCTP_INP_WUNLOCK(inp);
1904         SCTP_INP_RLOCK(inp);
1905         SCTP_INP_INFO_WUNLOCK();
1906         return (0);
1907 }
1908
1909
1910 struct sctp_inpcb *
1911 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1912     uint32_t vrf_id)
1913 {
1914         /*
1915          * First we check the hash table to see if someone has this port
1916          * bound with just the port.
1917          */
1918         struct sctp_inpcb *inp;
1919         struct sctppcbhead *head;
1920         int lport;
1921         unsigned int i;
1922 #ifdef INET
1923         struct sockaddr_in *sin;
1924 #endif
1925 #ifdef INET6
1926         struct sockaddr_in6 *sin6;
1927 #endif
1928
1929         switch (nam->sa_family) {
1930 #ifdef INET
1931         case AF_INET:
1932                 sin = (struct sockaddr_in *)nam;
1933                 lport = sin->sin_port;
1934                 break;
1935 #endif
1936 #ifdef INET6
1937         case AF_INET6:
1938                 sin6 = (struct sockaddr_in6 *)nam;
1939                 lport = sin6->sin6_port;
1940                 break;
1941 #endif
1942         default:
1943                 return (NULL);
1944         }
1945         /*
1946          * I could cheat here and just cast to one of the types but we will
1947          * do it right. It also provides the check against an Unsupported
1948          * type too.
1949          */
1950         /* Find the head of the ALLADDR chain */
1951         if (have_lock == 0) {
1952                 SCTP_INP_INFO_RLOCK();
1953         }
1954         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1955             SCTP_BASE_INFO(hashmark))];
1956         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1957
1958         /*
1959          * If the TCP model exists it could be that the main listening
1960          * endpoint is gone but there still exists a connected socket for
1961          * this guy. If so we can return the first one that we find. This
1962          * may NOT be the correct one so the caller should be wary on the
1963          * returned INP. Currently the only caller that sets find_tcp_pool
1964          * is in bindx where we are verifying that a user CAN bind the
1965          * address. He either has bound it already, or someone else has, or
1966          * its open to bind, so this is good enough.
1967          */
1968         if (inp == NULL && find_tcp_pool) {
1969                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1970                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1971                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1972                         if (inp) {
1973                                 break;
1974                         }
1975                 }
1976         }
1977         if (inp) {
1978                 SCTP_INP_INCR_REF(inp);
1979         }
1980         if (have_lock == 0) {
1981                 SCTP_INP_INFO_RUNLOCK();
1982         }
1983         return (inp);
1984 }
1985
1986
1987 /*
1988  * Find an association for an endpoint with the pointer to whom you want to
1989  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1990  * need to change the *to to some other struct like a mbuf...
1991  */
1992 struct sctp_tcb *
1993 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1994     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1995     uint32_t vrf_id)
1996 {
1997         struct sctp_inpcb *inp = NULL;
1998         struct sctp_tcb *stcb;
1999
2000         SCTP_INP_INFO_RLOCK();
2001         if (find_tcp_pool) {
2002                 if (inp_p != NULL) {
2003                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2004                             vrf_id);
2005                 } else {
2006                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2007                             vrf_id);
2008                 }
2009                 if (stcb != NULL) {
2010                         SCTP_INP_INFO_RUNLOCK();
2011                         return (stcb);
2012                 }
2013         }
2014         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2015         if (inp_p != NULL) {
2016                 *inp_p = inp;
2017         }
2018         SCTP_INP_INFO_RUNLOCK();
2019         if (inp == NULL) {
2020                 return (NULL);
2021         }
2022         /*
2023          * ok, we have an endpoint, now lets find the assoc for it (if any)
2024          * we now place the source address or from in the to of the find
2025          * endpoint call. Since in reality this chain is used from the
2026          * inbound packet side.
2027          */
2028         if (inp_p != NULL) {
2029                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2030                     NULL);
2031         } else {
2032                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2033                     NULL);
2034         }
2035         return (stcb);
2036 }
2037
2038
2039 /*
2040  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2041  * find all addresses that the sender has specified in any address list. Each
2042  * address will be used to lookup the TCB and see if one exits.
2043  */
2044 static struct sctp_tcb *
2045 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2046     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2047     struct sockaddr *dst)
2048 {
2049         struct sctp_paramhdr *phdr, parm_buf;
2050 #if defined(INET) || defined(INET6)
2051         struct sctp_tcb *stcb;
2052         uint16_t ptype;
2053 #endif
2054         uint16_t plen;
2055 #ifdef INET
2056         struct sockaddr_in sin4;
2057 #endif
2058 #ifdef INET6
2059         struct sockaddr_in6 sin6;
2060 #endif
2061
2062 #ifdef INET
2063         memset(&sin4, 0, sizeof(sin4));
2064         sin4.sin_len = sizeof(sin4);
2065         sin4.sin_family = AF_INET;
2066         sin4.sin_port = sh->src_port;
2067 #endif
2068 #ifdef INET6
2069         memset(&sin6, 0, sizeof(sin6));
2070         sin6.sin6_len = sizeof(sin6);
2071         sin6.sin6_family = AF_INET6;
2072         sin6.sin6_port = sh->src_port;
2073 #endif
2074
2075         offset += sizeof(struct sctp_init_chunk);
2076
2077         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2078         while (phdr != NULL) {
2079                 /* now we must see if we want the parameter */
2080 #if defined(INET) || defined(INET6)
2081                 ptype = ntohs(phdr->param_type);
2082 #endif
2083                 plen = ntohs(phdr->param_length);
2084                 if (plen == 0) {
2085                         break;
2086                 }
2087 #ifdef INET
2088                 if (ptype == SCTP_IPV4_ADDRESS &&
2089                     plen == sizeof(struct sctp_ipv4addr_param)) {
2090                         /* Get the rest of the address */
2091                         struct sctp_ipv4addr_param ip4_parm, *p4;
2092
2093                         phdr = sctp_get_next_param(m, offset,
2094                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2095                         if (phdr == NULL) {
2096                                 return (NULL);
2097                         }
2098                         p4 = (struct sctp_ipv4addr_param *)phdr;
2099                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2100                         /* look it up */
2101                         stcb = sctp_findassociation_ep_addr(inp_p,
2102                             (struct sockaddr *)&sin4, netp, dst, NULL);
2103                         if (stcb != NULL) {
2104                                 return (stcb);
2105                         }
2106                 }
2107 #endif
2108 #ifdef INET6
2109                 if (ptype == SCTP_IPV6_ADDRESS &&
2110                     plen == sizeof(struct sctp_ipv6addr_param)) {
2111                         /* Get the rest of the address */
2112                         struct sctp_ipv6addr_param ip6_parm, *p6;
2113
2114                         phdr = sctp_get_next_param(m, offset,
2115                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2116                         if (phdr == NULL) {
2117                                 return (NULL);
2118                         }
2119                         p6 = (struct sctp_ipv6addr_param *)phdr;
2120                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2121                         /* look it up */
2122                         stcb = sctp_findassociation_ep_addr(inp_p,
2123                             (struct sockaddr *)&sin6, netp, dst, NULL);
2124                         if (stcb != NULL) {
2125                                 return (stcb);
2126                         }
2127                 }
2128 #endif
2129                 offset += SCTP_SIZE32(plen);
2130                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2131                     sizeof(parm_buf));
2132         }
2133         return (NULL);
2134 }
2135
2136 static struct sctp_tcb *
2137 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2138     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2139     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2140 {
2141         /*
2142          * Use my vtag to hash. If we find it we then verify the source addr
2143          * is in the assoc. If all goes well we save a bit on rec of a
2144          * packet.
2145          */
2146         struct sctpasochead *head;
2147         struct sctp_nets *net;
2148         struct sctp_tcb *stcb;
2149
2150         SCTP_INP_INFO_RLOCK();
2151         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2152             SCTP_BASE_INFO(hashasocmark))];
2153         LIST_FOREACH(stcb, head, sctp_asocs) {
2154                 SCTP_INP_RLOCK(stcb->sctp_ep);
2155                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2156                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2157                         continue;
2158                 }
2159                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2160                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2161                         continue;
2162                 }
2163                 SCTP_TCB_LOCK(stcb);
2164                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2165                 if (stcb->asoc.my_vtag == vtag) {
2166                         /* candidate */
2167                         if (stcb->rport != rport) {
2168                                 SCTP_TCB_UNLOCK(stcb);
2169                                 continue;
2170                         }
2171                         if (stcb->sctp_ep->sctp_lport != lport) {
2172                                 SCTP_TCB_UNLOCK(stcb);
2173                                 continue;
2174                         }
2175                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2176                                 SCTP_TCB_UNLOCK(stcb);
2177                                 continue;
2178                         }
2179                         /* RRS:Need toaddr check here */
2180                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2181                                 /* Endpoint does not own this address */
2182                                 SCTP_TCB_UNLOCK(stcb);
2183                                 continue;
2184                         }
2185                         if (remote_tag) {
2186                                 /*
2187                                  * If we have both vtags that's all we match
2188                                  * on
2189                                  */
2190                                 if (stcb->asoc.peer_vtag == remote_tag) {
2191                                         /*
2192                                          * If both tags match we consider it
2193                                          * conclusive and check NO
2194                                          * source/destination addresses
2195                                          */
2196                                         goto conclusive;
2197                                 }
2198                         }
2199                         if (skip_src_check) {
2200                 conclusive:
2201                                 if (from) {
2202                                         *netp = sctp_findnet(stcb, from);
2203                                 } else {
2204                                         *netp = NULL;   /* unknown */
2205                                 }
2206                                 if (inp_p)
2207                                         *inp_p = stcb->sctp_ep;
2208                                 SCTP_INP_INFO_RUNLOCK();
2209                                 return (stcb);
2210                         }
2211                         net = sctp_findnet(stcb, from);
2212                         if (net) {
2213                                 /* yep its him. */
2214                                 *netp = net;
2215                                 SCTP_STAT_INCR(sctps_vtagexpress);
2216                                 *inp_p = stcb->sctp_ep;
2217                                 SCTP_INP_INFO_RUNLOCK();
2218                                 return (stcb);
2219                         } else {
2220                                 /*
2221                                  * not him, this should only happen in rare
2222                                  * cases so I peg it.
2223                                  */
2224                                 SCTP_STAT_INCR(sctps_vtagbogus);
2225                         }
2226                 }
2227                 SCTP_TCB_UNLOCK(stcb);
2228         }
2229         SCTP_INP_INFO_RUNLOCK();
2230         return (NULL);
2231 }
2232
2233
2234 /*
2235  * Find an association with the pointer to the inbound IP packet. This can be
2236  * a IPv4 or IPv6 packet.
2237  */
2238 struct sctp_tcb *
2239 sctp_findassociation_addr(struct mbuf *m, int offset,
2240     struct sockaddr *src, struct sockaddr *dst,
2241     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2242     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2243 {
2244         struct sctp_tcb *stcb;
2245         struct sctp_inpcb *inp;
2246
2247         if (sh->v_tag) {
2248                 /* we only go down this path if vtag is non-zero */
2249                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2250                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2251                 if (stcb) {
2252                         return (stcb);
2253                 }
2254         }
2255         if (inp_p) {
2256                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2257                     1, vrf_id);
2258                 inp = *inp_p;
2259         } else {
2260                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2261                     1, vrf_id);
2262         }
2263         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2264         if (stcb == NULL && inp) {
2265                 /* Found a EP but not this address */
2266                 if ((ch->chunk_type == SCTP_INITIATION) ||
2267                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2268                         /*-
2269                          * special hook, we do NOT return linp or an
2270                          * association that is linked to an existing
2271                          * association that is under the TCP pool (i.e. no
2272                          * listener exists). The endpoint finding routine
2273                          * will always find a listener before examining the
2274                          * TCP pool.
2275                          */
2276                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2277                                 if (inp_p) {
2278                                         *inp_p = NULL;
2279                                 }
2280                                 return (NULL);
2281                         }
2282                         stcb = sctp_findassociation_special_addr(m,
2283                             offset, sh, &inp, netp, dst);
2284                         if (inp_p != NULL) {
2285                                 *inp_p = inp;
2286                         }
2287                 }
2288         }
2289         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2290         return (stcb);
2291 }
2292
2293 /*
2294  * lookup an association by an ASCONF lookup address.
2295  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2296  */
2297 struct sctp_tcb *
2298 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2299     struct sockaddr *dst, struct sctphdr *sh,
2300     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2301 {
2302         struct sctp_tcb *stcb;
2303         union sctp_sockstore remote_store;
2304         struct sctp_paramhdr parm_buf, *phdr;
2305         int ptype;
2306         int zero_address = 0;
2307 #ifdef INET
2308         struct sockaddr_in *sin;
2309 #endif
2310 #ifdef INET6
2311         struct sockaddr_in6 *sin6;
2312 #endif
2313
2314         memset(&remote_store, 0, sizeof(remote_store));
2315         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2316             &parm_buf, sizeof(struct sctp_paramhdr));
2317         if (phdr == NULL) {
2318                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2319                     __func__);
2320                 return NULL;
2321         }
2322         ptype = (int)((uint32_t)ntohs(phdr->param_type));
2323         /* get the correlation address */
2324         switch (ptype) {
2325 #ifdef INET6
2326         case SCTP_IPV6_ADDRESS:
2327                 {
2328                         /* ipv6 address param */
2329                         struct sctp_ipv6addr_param *p6, p6_buf;
2330
2331                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2332                                 return NULL;
2333                         }
2334                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2335                             offset + sizeof(struct sctp_asconf_chunk),
2336                             &p6_buf.ph, sizeof(*p6));
2337                         if (p6 == NULL) {
2338                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2339                                     __func__);
2340                                 return (NULL);
2341                         }
2342                         sin6 = &remote_store.sin6;
2343                         sin6->sin6_family = AF_INET6;
2344                         sin6->sin6_len = sizeof(*sin6);
2345                         sin6->sin6_port = sh->src_port;
2346                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2347                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2348                                 zero_address = 1;
2349                         break;
2350                 }
2351 #endif
2352 #ifdef INET
2353         case SCTP_IPV4_ADDRESS:
2354                 {
2355                         /* ipv4 address param */
2356                         struct sctp_ipv4addr_param *p4, p4_buf;
2357
2358                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2359                                 return NULL;
2360                         }
2361                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2362                             offset + sizeof(struct sctp_asconf_chunk),
2363                             &p4_buf.ph, sizeof(*p4));
2364                         if (p4 == NULL) {
2365                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2366                                     __func__);
2367                                 return (NULL);
2368                         }
2369                         sin = &remote_store.sin;
2370                         sin->sin_family = AF_INET;
2371                         sin->sin_len = sizeof(*sin);
2372                         sin->sin_port = sh->src_port;
2373                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2374                         if (sin->sin_addr.s_addr == INADDR_ANY)
2375                                 zero_address = 1;
2376                         break;
2377                 }
2378 #endif
2379         default:
2380                 /* invalid address param type */
2381                 return NULL;
2382         }
2383
2384         if (zero_address) {
2385                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2386                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2387                 if (stcb != NULL) {
2388                         SCTP_INP_DECR_REF(*inp_p);
2389                 }
2390         } else {
2391                 stcb = sctp_findassociation_ep_addr(inp_p,
2392                     &remote_store.sa, netp,
2393                     dst, NULL);
2394         }
2395         return (stcb);
2396 }
2397
2398
2399 /*
2400  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2401  * addresses. This way if we don't get a bind we by default pick a ephemeral
2402  * port with all addresses bound.
2403  */
2404 int
2405 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2406 {
2407         /*
2408          * we get called when a new endpoint starts up. We need to allocate
2409          * the sctp_inpcb structure from the zone and init it. Mark it as
2410          * unbound and find a port that we can use as an ephemeral with
2411          * INADDR_ANY. If the user binds later no problem we can then add in
2412          * the specific addresses. And setup the default parameters for the
2413          * EP.
2414          */
2415         int i, error;
2416         struct sctp_inpcb *inp;
2417         struct sctp_pcb *m;
2418         struct timeval time;
2419         sctp_sharedkey_t *null_key;
2420
2421         error = 0;
2422
2423         SCTP_INP_INFO_WLOCK();
2424         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2425         if (inp == NULL) {
2426                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2427                 SCTP_INP_INFO_WUNLOCK();
2428                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2429                 return (ENOBUFS);
2430         }
2431         /* zap it */
2432         bzero(inp, sizeof(*inp));
2433
2434         /* bump generations */
2435         /* setup socket pointers */
2436         inp->sctp_socket = so;
2437         inp->ip_inp.inp.inp_socket = so;
2438         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2439 #ifdef INET6
2440         if (INP_SOCKAF(so) == AF_INET6) {
2441                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2442                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2443                 }
2444                 if (MODULE_GLOBAL(ip6_v6only)) {
2445                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2446                 }
2447         }
2448 #endif
2449         inp->sctp_associd_counter = 1;
2450         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2451         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2452         inp->max_cwnd = 0;
2453         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2454         inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2455         inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2456         inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2457         inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2458         inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2459         inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2460         inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2461         inp->idata_supported = 0;
2462
2463         inp->fibnum = so->so_fibnum;
2464         /* init the small hash table we use to track asocid <-> tcb */
2465         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2466         if (inp->sctp_asocidhash == NULL) {
2467                 crfree(inp->ip_inp.inp.inp_cred);
2468                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2469                 SCTP_INP_INFO_WUNLOCK();
2470                 return (ENOBUFS);
2471         }
2472 #ifdef IPSEC
2473         error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp);
2474         if (error != 0) {
2475                 crfree(inp->ip_inp.inp.inp_cred);
2476                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2477                 SCTP_INP_INFO_WUNLOCK();
2478                 return error;
2479         }
2480 #endif                          /* IPSEC */
2481         SCTP_INCR_EP_COUNT();
2482         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2483         SCTP_INP_INFO_WUNLOCK();
2484
2485         so->so_pcb = (caddr_t)inp;
2486
2487         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2488                 /* UDP style socket */
2489                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2490                     SCTP_PCB_FLAGS_UNBOUND);
2491                 /* Be sure it is NON-BLOCKING IO for UDP */
2492                 /* SCTP_SET_SO_NBIO(so); */
2493         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2494                 /* TCP style socket */
2495                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2496                     SCTP_PCB_FLAGS_UNBOUND);
2497                 /* Be sure we have blocking IO by default */
2498                 SCTP_CLEAR_SO_NBIO(so);
2499         } else {
2500                 /*
2501                  * unsupported socket type (RAW, etc)- in case we missed it
2502                  * in protosw
2503                  */
2504                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2505                 so->so_pcb = NULL;
2506                 crfree(inp->ip_inp.inp.inp_cred);
2507 #ifdef IPSEC
2508                 ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
2509 #endif
2510                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2511                 return (EOPNOTSUPP);
2512         }
2513         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2514                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2515                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2516         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2517                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2518                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2519         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2520                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2521                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2522         }
2523         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2524             &inp->sctp_hashmark);
2525         if (inp->sctp_tcbhash == NULL) {
2526                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2527                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2528                 so->so_pcb = NULL;
2529                 crfree(inp->ip_inp.inp.inp_cred);
2530 #ifdef IPSEC
2531                 ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
2532 #endif
2533                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2534                 return (ENOBUFS);
2535         }
2536         inp->def_vrf_id = vrf_id;
2537
2538         SCTP_INP_INFO_WLOCK();
2539         SCTP_INP_LOCK_INIT(inp);
2540         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2541         SCTP_INP_READ_INIT(inp);
2542         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2543         /* lock the new ep */
2544         SCTP_INP_WLOCK(inp);
2545
2546         /* add it to the info area */
2547         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2548         SCTP_INP_INFO_WUNLOCK();
2549
2550         TAILQ_INIT(&inp->read_queue);
2551         LIST_INIT(&inp->sctp_addr_list);
2552
2553         LIST_INIT(&inp->sctp_asoc_list);
2554
2555 #ifdef SCTP_TRACK_FREED_ASOCS
2556         /* TEMP CODE */
2557         LIST_INIT(&inp->sctp_asoc_free_list);
2558 #endif
2559         /* Init the timer structure for signature change */
2560         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2561         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2562
2563         /* now init the actual endpoint default data */
2564         m = &inp->sctp_ep;
2565
2566         /* setup the base timeout information */
2567         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2568         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2569         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2570         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2571         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2572         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2573         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2574         /* all max/min max are in ms */
2575         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2576         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2577         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2578         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2579         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2580         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2581         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2582         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2583         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2584         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2585         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2586         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2587         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2588
2589         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2590         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2591         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2592         /* number of streams to pre-open on a association */
2593         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2594
2595         /* Add adaptation cookie */
2596         m->adaptation_layer_indicator = 0;
2597         m->adaptation_layer_indicator_provided = 0;
2598
2599         /* seed random number generator */
2600         m->random_counter = 1;
2601         m->store_at = SCTP_SIGNATURE_SIZE;
2602         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2603         sctp_fill_random_store(m);
2604
2605         /* Minimum cookie size */
2606         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2607             sizeof(struct sctp_state_cookie);
2608         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2609
2610         /* Setup the initial secret */
2611         (void)SCTP_GETTIME_TIMEVAL(&time);
2612         m->time_of_secret_change = time.tv_sec;
2613
2614         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2615                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2616         }
2617         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2618
2619         /* How long is a cookie good for ? */
2620         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2621         /*
2622          * Initialize authentication parameters
2623          */
2624         m->local_hmacs = sctp_default_supported_hmaclist();
2625         m->local_auth_chunks = sctp_alloc_chunklist();
2626         if (inp->asconf_supported) {
2627                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2628                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2629         }
2630         m->default_dscp = 0;
2631 #ifdef INET6
2632         m->default_flowlabel = 0;
2633 #endif
2634         m->port = 0;            /* encapsulation disabled by default */
2635         LIST_INIT(&m->shared_keys);
2636         /* add default NULL key as key id 0 */
2637         null_key = sctp_alloc_sharedkey();
2638         sctp_insert_sharedkey(&m->shared_keys, null_key);
2639         SCTP_INP_WUNLOCK(inp);
2640 #ifdef SCTP_LOG_CLOSING
2641         sctp_log_closing(inp, NULL, 12);
2642 #endif
2643         return (error);
2644 }
2645
2646
2647 void
2648 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2649     struct sctp_tcb *stcb)
2650 {
2651         struct sctp_nets *net;
2652         uint16_t lport, rport;
2653         struct sctppcbhead *head;
2654         struct sctp_laddr *laddr, *oladdr;
2655
2656         atomic_add_int(&stcb->asoc.refcnt, 1);
2657         SCTP_TCB_UNLOCK(stcb);
2658         SCTP_INP_INFO_WLOCK();
2659         SCTP_INP_WLOCK(old_inp);
2660         SCTP_INP_WLOCK(new_inp);
2661         SCTP_TCB_LOCK(stcb);
2662         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2663
2664         new_inp->sctp_ep.time_of_secret_change =
2665             old_inp->sctp_ep.time_of_secret_change;
2666         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2667             sizeof(old_inp->sctp_ep.secret_key));
2668         new_inp->sctp_ep.current_secret_number =
2669             old_inp->sctp_ep.current_secret_number;
2670         new_inp->sctp_ep.last_secret_number =
2671             old_inp->sctp_ep.last_secret_number;
2672         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2673
2674         /* make it so new data pours into the new socket */
2675         stcb->sctp_socket = new_inp->sctp_socket;
2676         stcb->sctp_ep = new_inp;
2677
2678         /* Copy the port across */
2679         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2680         rport = stcb->rport;
2681         /* Pull the tcb from the old association */
2682         LIST_REMOVE(stcb, sctp_tcbhash);
2683         LIST_REMOVE(stcb, sctp_tcblist);
2684         if (stcb->asoc.in_asocid_hash) {
2685                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2686         }
2687         /* Now insert the new_inp into the TCP connected hash */
2688         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2689
2690         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2691         /* Its safe to access */
2692         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2693
2694         /* Now move the tcb into the endpoint list */
2695         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2696         /*
2697          * Question, do we even need to worry about the ep-hash since we
2698          * only have one connection? Probably not :> so lets get rid of it
2699          * and not suck up any kernel memory in that.
2700          */
2701         if (stcb->asoc.in_asocid_hash) {
2702                 struct sctpasochead *lhd;
2703
2704                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2705                     new_inp->hashasocidmark)];
2706                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2707         }
2708         /* Ok. Let's restart timer. */
2709         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2710                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2711                     stcb, net);
2712         }
2713
2714         SCTP_INP_INFO_WUNLOCK();
2715         if (new_inp->sctp_tcbhash != NULL) {
2716                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2717                 new_inp->sctp_tcbhash = NULL;
2718         }
2719         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2720                 /* Subset bound, so copy in the laddr list from the old_inp */
2721                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2722                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2723                         if (laddr == NULL) {
2724                                 /*
2725                                  * Gak, what can we do? This assoc is really
2726                                  * HOSED. We probably should send an abort
2727                                  * here.
2728                                  */
2729                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2730                                 continue;
2731                         }
2732                         SCTP_INCR_LADDR_COUNT();
2733                         bzero(laddr, sizeof(*laddr));
2734                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2735                         laddr->ifa = oladdr->ifa;
2736                         atomic_add_int(&laddr->ifa->refcount, 1);
2737                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2738                             sctp_nxt_addr);
2739                         new_inp->laddr_count++;
2740                         if (oladdr == stcb->asoc.last_used_address) {
2741                                 stcb->asoc.last_used_address = laddr;
2742                         }
2743                 }
2744         }
2745         /*
2746          * Now any running timers need to be adjusted since we really don't
2747          * care if they are running or not just blast in the new_inp into
2748          * all of them.
2749          */
2750
2751         stcb->asoc.dack_timer.ep = (void *)new_inp;
2752         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2753         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2754         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2755         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2756         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2757         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2758         /* now what about the nets? */
2759         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2760                 net->pmtu_timer.ep = (void *)new_inp;
2761                 net->hb_timer.ep = (void *)new_inp;
2762                 net->rxt_timer.ep = (void *)new_inp;
2763         }
2764         SCTP_INP_WUNLOCK(new_inp);
2765         SCTP_INP_WUNLOCK(old_inp);
2766 }
2767
2768 /*
2769  * insert an laddr entry with the given ifa for the desired list
2770  */
2771 static int
2772 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2773 {
2774         struct sctp_laddr *laddr;
2775
2776         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2777         if (laddr == NULL) {
2778                 /* out of memory? */
2779                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2780                 return (EINVAL);
2781         }
2782         SCTP_INCR_LADDR_COUNT();
2783         bzero(laddr, sizeof(*laddr));
2784         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2785         laddr->ifa = ifa;
2786         laddr->action = act;
2787         atomic_add_int(&ifa->refcount, 1);
2788         /* insert it */
2789         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2790
2791         return (0);
2792 }
2793
2794 /*
2795  * Remove an laddr entry from the local address list (on an assoc)
2796  */
2797 static void
2798 sctp_remove_laddr(struct sctp_laddr *laddr)
2799 {
2800
2801         /* remove from the list */
2802         LIST_REMOVE(laddr, sctp_nxt_addr);
2803         sctp_free_ifa(laddr->ifa);
2804         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2805         SCTP_DECR_LADDR_COUNT();
2806 }
2807
2808
2809
2810 /* sctp_ifap is used to bypass normal local address validation checks */
2811 int
2812 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2813     struct sctp_ifa *sctp_ifap, struct thread *p)
2814 {
2815         /* bind a ep to a socket address */
2816         struct sctppcbhead *head;
2817         struct sctp_inpcb *inp, *inp_tmp;
2818         struct inpcb *ip_inp;
2819         int port_reuse_active = 0;
2820         int bindall;
2821         uint16_t lport;
2822         int error;
2823         uint32_t vrf_id;
2824
2825         lport = 0;
2826         bindall = 1;
2827         inp = (struct sctp_inpcb *)so->so_pcb;
2828         ip_inp = (struct inpcb *)so->so_pcb;
2829 #ifdef SCTP_DEBUG
2830         if (addr) {
2831                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2832                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2833                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2834                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2835         }
2836 #endif
2837         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2838                 /* already did a bind, subsequent binds NOT allowed ! */
2839                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2840                 return (EINVAL);
2841         }
2842 #ifdef INVARIANTS
2843         if (p == NULL)
2844                 panic("null proc/thread");
2845 #endif
2846         if (addr != NULL) {
2847                 switch (addr->sa_family) {
2848 #ifdef INET
2849                 case AF_INET:
2850                         {
2851                                 struct sockaddr_in *sin;
2852
2853                                 /* IPV6_V6ONLY socket? */
2854                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2855                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2856                                         return (EINVAL);
2857                                 }
2858                                 if (addr->sa_len != sizeof(*sin)) {
2859                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2860                                         return (EINVAL);
2861                                 }
2862                                 sin = (struct sockaddr_in *)addr;
2863                                 lport = sin->sin_port;
2864                                 /*
2865                                  * For LOOPBACK the prison_local_ip4() call
2866                                  * will transmute the ip address to the
2867                                  * proper value.
2868                                  */
2869                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2870                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2871                                         return (error);
2872                                 }
2873                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2874                                         bindall = 0;
2875                                 }
2876                                 break;
2877                         }
2878 #endif
2879 #ifdef INET6
2880                 case AF_INET6:
2881                         {
2882                                 /*
2883                                  * Only for pure IPv6 Address. (No IPv4
2884                                  * Mapped!)
2885                                  */
2886                                 struct sockaddr_in6 *sin6;
2887
2888                                 sin6 = (struct sockaddr_in6 *)addr;
2889
2890                                 if (addr->sa_len != sizeof(*sin6)) {
2891                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2892                                         return (EINVAL);
2893                                 }
2894                                 lport = sin6->sin6_port;
2895                                 /*
2896                                  * For LOOPBACK the prison_local_ip6() call
2897                                  * will transmute the ipv6 address to the
2898                                  * proper value.
2899                                  */
2900                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2901                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2902                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2903                                         return (error);
2904                                 }
2905                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2906                                         bindall = 0;
2907                                         /* KAME hack: embed scopeid */
2908                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2909                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2910                                                 return (EINVAL);
2911                                         }
2912                                 }
2913                                 /* this must be cleared for ifa_ifwithaddr() */
2914                                 sin6->sin6_scope_id = 0;
2915                                 break;
2916                         }
2917 #endif
2918                 default:
2919                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2920                         return (EAFNOSUPPORT);
2921                 }
2922         }
2923         SCTP_INP_INFO_WLOCK();
2924         SCTP_INP_WLOCK(inp);
2925         /* Setup a vrf_id to be the default for the non-bind-all case. */
2926         vrf_id = inp->def_vrf_id;
2927
2928         /* increase our count due to the unlock we do */
2929         SCTP_INP_INCR_REF(inp);
2930         if (lport) {
2931                 /*
2932                  * Did the caller specify a port? if so we must see if an ep
2933                  * already has this one bound.
2934                  */
2935                 /* got to be root to get at low ports */
2936                 if (ntohs(lport) < IPPORT_RESERVED) {
2937                         if (p && (error =
2938                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2939                             )) {
2940                                 SCTP_INP_DECR_REF(inp);
2941                                 SCTP_INP_WUNLOCK(inp);
2942                                 SCTP_INP_INFO_WUNLOCK();
2943                                 return (error);
2944                         }
2945                 }
2946                 SCTP_INP_WUNLOCK(inp);
2947                 if (bindall) {
2948                         vrf_id = inp->def_vrf_id;
2949                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2950                         if (inp_tmp != NULL) {
2951                                 /*
2952                                  * lock guy returned and lower count note
2953                                  * that we are not bound so inp_tmp should
2954                                  * NEVER be inp. And it is this inp
2955                                  * (inp_tmp) that gets the reference bump,
2956                                  * so we must lower it.
2957                                  */
2958                                 SCTP_INP_DECR_REF(inp_tmp);
2959                                 /* unlock info */
2960                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2961                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2962                                         /*
2963                                          * Ok, must be one-2-one and
2964                                          * allowing port re-use
2965                                          */
2966                                         port_reuse_active = 1;
2967                                         goto continue_anyway;
2968                                 }
2969                                 SCTP_INP_DECR_REF(inp);
2970                                 SCTP_INP_INFO_WUNLOCK();
2971                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2972                                 return (EADDRINUSE);
2973                         }
2974                 } else {
2975                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2976                         if (inp_tmp != NULL) {
2977                                 /*
2978                                  * lock guy returned and lower count note
2979                                  * that we are not bound so inp_tmp should
2980                                  * NEVER be inp. And it is this inp
2981                                  * (inp_tmp) that gets the reference bump,
2982                                  * so we must lower it.
2983                                  */
2984                                 SCTP_INP_DECR_REF(inp_tmp);
2985                                 /* unlock info */
2986                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2987                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2988                                         /*
2989                                          * Ok, must be one-2-one and
2990                                          * allowing port re-use
2991                                          */
2992                                         port_reuse_active = 1;
2993                                         goto continue_anyway;
2994                                 }
2995                                 SCTP_INP_DECR_REF(inp);
2996                                 SCTP_INP_INFO_WUNLOCK();
2997                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2998                                 return (EADDRINUSE);
2999                         }
3000                 }
3001 continue_anyway:
3002                 SCTP_INP_WLOCK(inp);
3003                 if (bindall) {
3004                         /* verify that no lport is not used by a singleton */
3005                         if ((port_reuse_active == 0) &&
3006                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3007                                 /* Sorry someone already has this one bound */
3008                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3009                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3010                                         port_reuse_active = 1;
3011                                 } else {
3012                                         SCTP_INP_DECR_REF(inp);
3013                                         SCTP_INP_WUNLOCK(inp);
3014                                         SCTP_INP_INFO_WUNLOCK();
3015                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3016                                         return (EADDRINUSE);
3017                                 }
3018                         }
3019                 }
3020         } else {
3021                 uint16_t first, last, candidate;
3022                 uint16_t count;
3023                 int done;
3024
3025                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3026                         first = MODULE_GLOBAL(ipport_hifirstauto);
3027                         last = MODULE_GLOBAL(ipport_hilastauto);
3028                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3029                         if (p && (error =
3030                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3031                             )) {
3032                                 SCTP_INP_DECR_REF(inp);
3033                                 SCTP_INP_WUNLOCK(inp);
3034                                 SCTP_INP_INFO_WUNLOCK();
3035                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3036                                 return (error);
3037                         }
3038                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3039                         last = MODULE_GLOBAL(ipport_lowlastauto);
3040                 } else {
3041                         first = MODULE_GLOBAL(ipport_firstauto);
3042                         last = MODULE_GLOBAL(ipport_lastauto);
3043                 }
3044                 if (first > last) {
3045                         uint16_t temp;
3046
3047                         temp = first;
3048                         first = last;
3049                         last = temp;
3050                 }
3051                 count = last - first + 1;       /* number of candidates */
3052                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3053
3054                 done = 0;
3055                 while (!done) {
3056                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3057                                 done = 1;
3058                         }
3059                         if (!done) {
3060                                 if (--count == 0) {
3061                                         SCTP_INP_DECR_REF(inp);
3062                                         SCTP_INP_WUNLOCK(inp);
3063                                         SCTP_INP_INFO_WUNLOCK();
3064                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3065                                         return (EADDRINUSE);
3066                                 }
3067                                 if (candidate == last)
3068                                         candidate = first;
3069                                 else
3070                                         candidate = candidate + 1;
3071                         }
3072                 }
3073                 lport = htons(candidate);
3074         }
3075         SCTP_INP_DECR_REF(inp);
3076         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3077             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3078                 /*
3079                  * this really should not happen. The guy did a non-blocking
3080                  * bind and then did a close at the same time.
3081                  */
3082                 SCTP_INP_WUNLOCK(inp);
3083                 SCTP_INP_INFO_WUNLOCK();
3084                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3085                 return (EINVAL);
3086         }
3087         /* ok we look clear to give out this port, so lets setup the binding */
3088         if (bindall) {
3089                 /* binding to all addresses, so just set in the proper flags */
3090                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3091                 /* set the automatic addr changes from kernel flag */
3092                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3093                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3094                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3095                 } else {
3096                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3097                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3098                 }
3099                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3100                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3101                 } else {
3102                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3103                 }
3104                 /*
3105                  * set the automatic mobility_base from kernel flag (by
3106                  * micchie)
3107                  */
3108                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3109                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3110                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3111                 } else {
3112                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3113                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3114                 }
3115                 /*
3116                  * set the automatic mobility_fasthandoff from kernel flag
3117                  * (by micchie)
3118                  */
3119                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3120                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3121                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3122                 } else {
3123                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3124                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3125                 }
3126         } else {
3127                 /*
3128                  * bind specific, make sure flags is off and add a new
3129                  * address structure to the sctp_addr_list inside the ep
3130                  * structure.
3131                  *
3132                  * We will need to allocate one and insert it at the head.
3133                  * The socketopt call can just insert new addresses in there
3134                  * as well. It will also have to do the embed scope kame
3135                  * hack too (before adding).
3136                  */
3137                 struct sctp_ifa *ifa;
3138                 union sctp_sockstore store;
3139
3140                 memset(&store, 0, sizeof(store));
3141                 switch (addr->sa_family) {
3142 #ifdef INET
3143                 case AF_INET:
3144                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3145                         store.sin.sin_port = 0;
3146                         break;
3147 #endif
3148 #ifdef INET6
3149                 case AF_INET6:
3150                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3151                         store.sin6.sin6_port = 0;
3152                         break;
3153 #endif
3154                 default:
3155                         break;
3156                 }
3157                 /*
3158                  * first find the interface with the bound address need to
3159                  * zero out the port to find the address! yuck! can't do
3160                  * this earlier since need port for sctp_pcb_findep()
3161                  */
3162                 if (sctp_ifap != NULL) {
3163                         ifa = sctp_ifap;
3164                 } else {
3165                         /*
3166                          * Note for BSD we hit here always other O/S's will
3167                          * pass things in via the sctp_ifap argument
3168                          * (Panda).
3169                          */
3170                         ifa = sctp_find_ifa_by_addr(&store.sa,
3171                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3172                 }
3173                 if (ifa == NULL) {
3174                         /* Can't find an interface with that address */
3175                         SCTP_INP_WUNLOCK(inp);
3176                         SCTP_INP_INFO_WUNLOCK();
3177                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3178                         return (EADDRNOTAVAIL);
3179                 }
3180 #ifdef INET6
3181                 if (addr->sa_family == AF_INET6) {
3182                         /* GAK, more FIXME IFA lock? */
3183                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3184                                 /* Can't bind a non-existent addr. */
3185                                 SCTP_INP_WUNLOCK(inp);
3186                                 SCTP_INP_INFO_WUNLOCK();
3187                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3188                                 return (EINVAL);
3189                         }
3190                 }
3191 #endif
3192                 /* we're not bound all */
3193                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3194                 /* allow bindx() to send ASCONF's for binding changes */
3195                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3196                 /* clear automatic addr changes from kernel flag */
3197                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3198
3199                 /* add this address to the endpoint list */
3200                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3201                 if (error != 0) {
3202                         SCTP_INP_WUNLOCK(inp);
3203                         SCTP_INP_INFO_WUNLOCK();
3204                         return (error);
3205                 }
3206                 inp->laddr_count++;
3207         }
3208         /* find the bucket */
3209         if (port_reuse_active) {
3210                 /* Put it into tcp 1-2-1 hash */
3211                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3212                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3213         } else {
3214                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3215         }
3216         /* put it in the bucket */
3217         LIST_INSERT_HEAD(head, inp, sctp_hash);
3218         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3219             (void *)head, ntohs(lport), port_reuse_active);
3220         /* set in the port */
3221         inp->sctp_lport = lport;
3222
3223         /* turn off just the unbound flag */
3224         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3225         SCTP_INP_WUNLOCK(inp);
3226         SCTP_INP_INFO_WUNLOCK();
3227         return (0);
3228 }
3229
3230
3231 static void
3232 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3233 {
3234         struct sctp_iterator *it, *nit;
3235
3236         /*
3237          * We enter with the only the ITERATOR_LOCK in place and a write
3238          * lock on the inp_info stuff.
3239          */
3240         it = sctp_it_ctl.cur_it;
3241         if (it && (it->vn != curvnet)) {
3242                 /* Its not looking at our VNET */
3243                 return;
3244         }
3245         if (it && (it->inp == inp)) {
3246                 /*
3247                  * This is tricky and we hold the iterator lock, but when it
3248                  * returns and gets the lock (when we release it) the
3249                  * iterator will try to operate on inp. We need to stop that
3250                  * from happening. But of course the iterator has a
3251                  * reference on the stcb and inp. We can mark it and it will
3252                  * stop.
3253                  *
3254                  * If its a single iterator situation, we set the end
3255                  * iterator flag. Otherwise we set the iterator to go to the
3256                  * next inp.
3257                  *
3258                  */
3259                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3260                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3261                 } else {
3262                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3263                 }
3264         }
3265         /*
3266          * Now go through and remove any single reference to our inp that
3267          * may be still pending on the list
3268          */
3269         SCTP_IPI_ITERATOR_WQ_LOCK();
3270         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3271                 if (it->vn != curvnet) {
3272                         continue;
3273                 }
3274                 if (it->inp == inp) {
3275                         /* This one points to me is it inp specific? */
3276                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3277                                 /* Remove and free this one */
3278                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3279                                     it, sctp_nxt_itr);
3280                                 if (it->function_atend != NULL) {
3281                                         (*it->function_atend) (it->pointer, it->val);
3282                                 }
3283                                 SCTP_FREE(it, SCTP_M_ITER);
3284                         } else {
3285                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3286                                 if (it->inp) {
3287                                         SCTP_INP_INCR_REF(it->inp);
3288                                 }
3289                         }
3290                         /*
3291                          * When its put in the refcnt is incremented so decr
3292                          * it
3293                          */
3294                         SCTP_INP_DECR_REF(inp);
3295                 }
3296         }
3297         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3298 }
3299
3300 /* release sctp_inpcb unbind the port */
3301 void
3302 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3303 {
3304         /*
3305          * Here we free a endpoint. We must find it (if it is in the Hash
3306          * table) and remove it from there. Then we must also find it in the
3307          * overall list and remove it from there. After all removals are
3308          * complete then any timer has to be stopped. Then start the actual
3309          * freeing. a) Any local lists. b) Any associations. c) The hash of
3310          * all associations. d) finally the ep itself.
3311          */
3312         struct sctp_tcb *asoc, *nasoc;
3313         struct sctp_laddr *laddr, *nladdr;
3314         struct inpcb *ip_pcb;
3315         struct socket *so;
3316         int being_refed = 0;
3317         struct sctp_queued_to_read *sq, *nsq;
3318         int cnt;
3319         sctp_sharedkey_t *shared_key, *nshared_key;
3320
3321
3322 #ifdef SCTP_LOG_CLOSING
3323         sctp_log_closing(inp, NULL, 0);
3324 #endif
3325         SCTP_ITERATOR_LOCK();
3326         /* mark any iterators on the list or being processed */
3327         sctp_iterator_inp_being_freed(inp);
3328         SCTP_ITERATOR_UNLOCK();
3329         so = inp->sctp_socket;
3330         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3331                 /* been here before.. eeks.. get out of here */
3332                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3333 #ifdef SCTP_LOG_CLOSING
3334                 sctp_log_closing(inp, NULL, 1);
3335 #endif
3336                 return;
3337         }
3338         SCTP_ASOC_CREATE_LOCK(inp);
3339         SCTP_INP_INFO_WLOCK();
3340
3341         SCTP_INP_WLOCK(inp);
3342         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3343                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3344                 /* socket is gone, so no more wakeups allowed */
3345                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3346                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3347                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3348
3349         }
3350         /* First time through we have the socket lock, after that no more. */
3351         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3352             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3353
3354         if (inp->control) {
3355                 sctp_m_freem(inp->control);
3356                 inp->control = NULL;
3357         }
3358         if (inp->pkt) {
3359                 sctp_m_freem(inp->pkt);
3360                 inp->pkt = NULL;
3361         }
3362         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3363                                          * here but I will be nice :> (i.e.
3364                                          * ip_pcb = ep;) */
3365         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3366                 int cnt_in_sd;
3367
3368                 cnt_in_sd = 0;
3369                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3370                         SCTP_TCB_LOCK(asoc);
3371                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3372                                 /* Skip guys being freed */
3373                                 cnt_in_sd++;
3374                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3375                                         /*
3376                                          * Special case - we did not start a
3377                                          * kill timer on the asoc due to it
3378                                          * was not closed. So go ahead and
3379                                          * start it now.
3380                                          */
3381                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3382                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3383                                 }
3384                                 SCTP_TCB_UNLOCK(asoc);
3385                                 continue;
3386                         }
3387                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3388                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3389                             (asoc->asoc.total_output_queue_size == 0)) {
3390                                 /*
3391                                  * If we have data in queue, we don't want
3392                                  * to just free since the app may have done,
3393                                  * send()/close or connect/send/close. And
3394                                  * it wants the data to get across first.
3395                                  */
3396                                 /* Just abandon things in the front states */
3397                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3398                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3399                                         cnt_in_sd++;
3400                                 }
3401                                 continue;
3402                         }
3403                         /* Disconnect the socket please */
3404                         asoc->sctp_socket = NULL;
3405                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3406                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3407                             (asoc->asoc.control_pdapi) ||
3408                             (asoc->asoc.size_on_all_streams > 0) ||
3409                             (so && (so->so_rcv.sb_cc > 0))) {
3410                                 /* Left with Data unread */
3411                                 struct mbuf *op_err;
3412
3413                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3414                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3415                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3416                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3417                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3418                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3419                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3420                                 }
3421                                 if (sctp_free_assoc(inp, asoc,
3422                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3423                                         cnt_in_sd++;
3424                                 }
3425                                 continue;
3426                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3427                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3428                             (asoc->asoc.stream_queue_cnt == 0)) {
3429                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3430                                         goto abort_anyway;
3431                                 }
3432                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3433                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3434                                         struct sctp_nets *netp;
3435
3436                                         /*
3437                                          * there is nothing queued to send,
3438                                          * so I send shutdown
3439                                          */
3440                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3441                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3442                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3443                                         }
3444                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3445                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3446                                         sctp_stop_timers_for_shutdown(asoc);
3447                                         if (asoc->asoc.alternate) {
3448                                                 netp = asoc->asoc.alternate;
3449                                         } else {
3450                                                 netp = asoc->asoc.primary_destination;
3451                                         }
3452                                         sctp_send_shutdown(asoc, netp);
3453                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3454                                             netp);
3455                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3456                                             asoc->asoc.primary_destination);
3457                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3458                                 }
3459                         } else {
3460                                 /* mark into shutdown pending */
3461                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3462                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3463                                     asoc->asoc.primary_destination);
3464                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3465                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3466                                 }
3467                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3468                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3469                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3470                                         struct mbuf *op_err;
3471
3472                         abort_anyway:
3473                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3474                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3475                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3476                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3477                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3478                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3479                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3480                                         }
3481                                         if (sctp_free_assoc(inp, asoc,
3482                                             SCTP_PCBFREE_NOFORCE,
3483                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3484                                                 cnt_in_sd++;
3485                                         }
3486                                         continue;
3487                                 } else {
3488                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3489                                 }
3490                         }
3491                         cnt_in_sd++;
3492                         SCTP_TCB_UNLOCK(asoc);
3493                 }
3494                 /* now is there some left in our SHUTDOWN state? */
3495                 if (cnt_in_sd) {
3496 #ifdef SCTP_LOG_CLOSING
3497                         sctp_log_closing(inp, NULL, 2);
3498 #endif
3499                         inp->sctp_socket = NULL;
3500                         SCTP_INP_WUNLOCK(inp);
3501                         SCTP_ASOC_CREATE_UNLOCK(inp);
3502                         SCTP_INP_INFO_WUNLOCK();
3503                         return;
3504                 }
3505         }
3506         inp->sctp_socket = NULL;
3507         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3508             SCTP_PCB_FLAGS_UNBOUND) {
3509                 /*
3510                  * ok, this guy has been bound. It's port is somewhere in
3511                  * the SCTP_BASE_INFO(hash table). Remove it!
3512                  */
3513                 LIST_REMOVE(inp, sctp_hash);
3514                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3515         }
3516         /*
3517          * If there is a timer running to kill us, forget it, since it may
3518          * have a contest on the INP lock.. which would cause us to die ...
3519          */
3520         cnt = 0;
3521         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3522                 SCTP_TCB_LOCK(asoc);
3523                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3524                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3525                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3526                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3527                         }
3528                         cnt++;
3529                         SCTP_TCB_UNLOCK(asoc);
3530                         continue;
3531                 }
3532                 /* Free associations that are NOT killing us */
3533                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3534                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3535                         struct mbuf *op_err;
3536
3537                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3538                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3539                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3540                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3541                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3542                         cnt++;
3543                         SCTP_TCB_UNLOCK(asoc);
3544                         continue;
3545                 }
3546                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3547                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3548                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3549                 }
3550                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3551                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3552                         cnt++;
3553                 }
3554         }
3555         if (cnt) {
3556                 /* Ok we have someone out there that will kill us */
3557                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3558 #ifdef SCTP_LOG_CLOSING
3559                 sctp_log_closing(inp, NULL, 3);
3560 #endif
3561                 SCTP_INP_WUNLOCK(inp);
3562                 SCTP_ASOC_CREATE_UNLOCK(inp);
3563                 SCTP_INP_INFO_WUNLOCK();
3564                 return;
3565         }
3566         if (SCTP_INP_LOCK_CONTENDED(inp))
3567                 being_refed++;
3568         if (SCTP_INP_READ_CONTENDED(inp))
3569                 being_refed++;
3570         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3571                 being_refed++;
3572
3573         if ((inp->refcount) ||
3574             (being_refed) ||
3575             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3576                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3577 #ifdef SCTP_LOG_CLOSING
3578                 sctp_log_closing(inp, NULL, 4);
3579 #endif
3580                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3581                 SCTP_INP_WUNLOCK(inp);
3582                 SCTP_ASOC_CREATE_UNLOCK(inp);
3583                 SCTP_INP_INFO_WUNLOCK();
3584                 return;
3585         }
3586         inp->sctp_ep.signature_change.type = 0;
3587         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3588         /*
3589          * Remove it from the list .. last thing we need a lock for.
3590          */
3591         LIST_REMOVE(inp, sctp_list);
3592         SCTP_INP_WUNLOCK(inp);
3593         SCTP_ASOC_CREATE_UNLOCK(inp);
3594         SCTP_INP_INFO_WUNLOCK();
3595         /*
3596          * Now we release all locks. Since this INP cannot be found anymore
3597          * except possibly by the kill timer that might be running. We call
3598          * the drain function here. It should hit the case were it sees the
3599          * ACTIVE flag cleared and exit out freeing us to proceed and
3600          * destroy everything.
3601          */
3602         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3603                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3604         } else {
3605                 /* Probably un-needed */
3606                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3607         }
3608
3609 #ifdef SCTP_LOG_CLOSING
3610         sctp_log_closing(inp, NULL, 5);
3611 #endif
3612
3613
3614         if ((inp->sctp_asocidhash) != NULL) {
3615                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3616                 inp->sctp_asocidhash = NULL;
3617         }
3618         /* sa_ignore FREED_MEMORY */
3619         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3620                 /* Its only abandoned if it had data left */
3621                 if (sq->length)
3622                         SCTP_STAT_INCR(sctps_left_abandon);
3623
3624                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3625                 sctp_free_remote_addr(sq->whoFrom);
3626                 if (so)
3627                         so->so_rcv.sb_cc -= sq->length;
3628                 if (sq->data) {
3629                         sctp_m_freem(sq->data);
3630                         sq->data = NULL;
3631                 }
3632                 /*
3633                  * no need to free the net count, since at this point all
3634                  * assoc's are gone.
3635                  */
3636                 sctp_free_a_readq(NULL, sq);
3637         }
3638         /* Now the sctp_pcb things */
3639         /*
3640          * free each asoc if it is not already closed/free. we can't use the
3641          * macro here since le_next will get freed as part of the
3642          * sctp_free_assoc() call.
3643          */
3644 #ifdef IPSEC
3645         ipsec_delete_pcbpolicy(ip_pcb);
3646 #endif
3647         if (ip_pcb->inp_options) {
3648                 (void)sctp_m_free(ip_pcb->inp_options);
3649                 ip_pcb->inp_options = 0;
3650         }
3651 #ifdef INET6
3652         if (ip_pcb->inp_vflag & INP_IPV6) {
3653                 struct in6pcb *in6p;
3654
3655                 in6p = (struct in6pcb *)inp;
3656                 ip6_freepcbopts(in6p->in6p_outputopts);
3657         }
3658 #endif                          /* INET6 */
3659         ip_pcb->inp_vflag = 0;
3660         /* free up authentication fields */
3661         if (inp->sctp_ep.local_auth_chunks != NULL)
3662                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3663         if (inp->sctp_ep.local_hmacs != NULL)
3664                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3665
3666         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3667                 LIST_REMOVE(shared_key, next);
3668                 sctp_free_sharedkey(shared_key);
3669                 /* sa_ignore FREED_MEMORY */
3670         }
3671
3672         /*
3673          * if we have an address list the following will free the list of
3674          * ifaddr's that are set into this ep. Again macro limitations here,
3675          * since the LIST_FOREACH could be a bad idea.
3676          */
3677         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3678                 sctp_remove_laddr(laddr);
3679         }
3680
3681 #ifdef SCTP_TRACK_FREED_ASOCS
3682         /* TEMP CODE */
3683         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3684                 LIST_REMOVE(asoc, sctp_tcblist);
3685                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3686                 SCTP_DECR_ASOC_COUNT();
3687         }
3688         /* *** END TEMP CODE *** */
3689 #endif
3690         /* Now lets see about freeing the EP hash table. */
3691         if (inp->sctp_tcbhash != NULL) {
3692                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3693                 inp->sctp_tcbhash = NULL;
3694         }
3695         /* Now we must put the ep memory back into the zone pool */
3696         crfree(inp->ip_inp.inp.inp_cred);
3697         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3698         SCTP_INP_LOCK_DESTROY(inp);
3699         SCTP_INP_READ_DESTROY(inp);
3700         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3701         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3702         SCTP_DECR_EP_COUNT();
3703 }
3704
3705
3706 struct sctp_nets *
3707 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3708 {
3709         struct sctp_nets *net;
3710
3711         /* locate the address */
3712         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3713                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3714                         return (net);
3715         }
3716         return (NULL);
3717 }
3718
3719
3720 int
3721 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3722 {
3723         struct sctp_ifa *sctp_ifa;
3724
3725         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3726         if (sctp_ifa) {
3727                 return (1);
3728         } else {
3729                 return (0);
3730         }
3731 }
3732
3733 /*
3734  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3735  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3736  * stats of stuff.
3737  */
3738 int
3739 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3740     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3741 {
3742         /*
3743          * The following is redundant to the same lines in the
3744          * sctp_aloc_assoc() but is needed since others call the add address
3745          * function
3746          */
3747         struct sctp_nets *net, *netfirst;
3748         int addr_inscope;
3749
3750         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3751             from);
3752         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3753
3754         netfirst = sctp_findnet(stcb, newaddr);
3755         if (netfirst) {
3756                 /*
3757                  * Lie and return ok, we don't want to make the association
3758                  * go away for this behavior. It will happen in the TCP
3759                  * model in a connected socket. It does not reach the hash
3760                  * table until after the association is built so it can't be
3761                  * found. Mark as reachable, since the initial creation will
3762                  * have been cleared and the NOT_IN_ASSOC flag will have
3763                  * been added... and we don't want to end up removing it
3764                  * back out.
3765                  */
3766                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3767                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3768                             SCTP_ADDR_UNCONFIRMED);
3769                 } else {
3770                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3771                 }
3772
3773                 return (0);
3774         }
3775         addr_inscope = 1;
3776         switch (newaddr->sa_family) {
3777 #ifdef INET
3778         case AF_INET:
3779                 {
3780                         struct sockaddr_in *sin;
3781
3782                         sin = (struct sockaddr_in *)newaddr;
3783                         if (sin->sin_addr.s_addr == 0) {
3784                                 /* Invalid address */
3785                                 return (-1);
3786                         }
3787                         /* zero out the bzero area */
3788                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3789
3790                         /* assure len is set */
3791                         sin->sin_len = sizeof(struct sockaddr_in);
3792                         if (set_scope) {
3793                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3794                                         stcb->asoc.scope.ipv4_local_scope = 1;
3795                                 }
3796                         } else {
3797                                 /* Validate the address is in scope */
3798                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3799                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3800                                         addr_inscope = 0;
3801                                 }
3802                         }
3803                         break;
3804                 }
3805 #endif
3806 #ifdef INET6
3807         case AF_INET6:
3808                 {
3809                         struct sockaddr_in6 *sin6;
3810
3811                         sin6 = (struct sockaddr_in6 *)newaddr;
3812                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3813                                 /* Invalid address */
3814                                 return (-1);
3815                         }
3816                         /* assure len is set */
3817                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3818                         if (set_scope) {
3819                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3820                                         stcb->asoc.scope.loopback_scope = 1;
3821                                         stcb->asoc.scope.local_scope = 0;
3822                                         stcb->asoc.scope.ipv4_local_scope = 1;
3823                                         stcb->asoc.scope.site_scope = 1;
3824                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3825                                         /*
3826                                          * If the new destination is a
3827                                          * LINK_LOCAL we must have common
3828                                          * site scope. Don't set the local
3829                                          * scope since we may not share all
3830                                          * links, only loopback can do this.
3831                                          * Links on the local network would
3832                                          * also be on our private network
3833                                          * for v4 too.
3834                                          */
3835                                         stcb->asoc.scope.ipv4_local_scope = 1;
3836                                         stcb->asoc.scope.site_scope = 1;
3837                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3838                                         /*
3839                                          * If the new destination is
3840                                          * SITE_LOCAL then we must have site
3841                                          * scope in common.
3842                                          */
3843                                         stcb->asoc.scope.site_scope = 1;
3844                                 }
3845                         } else {
3846                                 /* Validate the address is in scope */
3847                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3848                                     (stcb->asoc.scope.loopback_scope == 0)) {
3849                                         addr_inscope = 0;
3850                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3851                                     (stcb->asoc.scope.local_scope == 0)) {
3852                                         addr_inscope = 0;
3853                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3854                                     (stcb->asoc.scope.site_scope == 0)) {
3855                                         addr_inscope = 0;
3856                                 }
3857                         }
3858                         break;
3859                 }
3860 #endif
3861         default:
3862                 /* not supported family type */
3863                 return (-1);
3864         }
3865         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3866         if (net == NULL) {
3867                 return (-1);
3868         }
3869         SCTP_INCR_RADDR_COUNT();
3870         bzero(net, sizeof(struct sctp_nets));
3871         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3872         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3873         switch (newaddr->sa_family) {
3874 #ifdef INET
3875         case AF_INET:
3876                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3877                 break;
3878 #endif
3879 #ifdef INET6
3880         case AF_INET6:
3881                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3882                 break;
3883 #endif
3884         default:
3885                 break;
3886         }
3887         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3888         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3889                 stcb->asoc.scope.loopback_scope = 1;
3890                 stcb->asoc.scope.ipv4_local_scope = 1;
3891                 stcb->asoc.scope.local_scope = 0;
3892                 stcb->asoc.scope.site_scope = 1;
3893                 addr_inscope = 1;
3894         }
3895         net->failure_threshold = stcb->asoc.def_net_failure;
3896         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3897         if (addr_inscope == 0) {
3898                 net->dest_state = (SCTP_ADDR_REACHABLE |
3899                     SCTP_ADDR_OUT_OF_SCOPE);
3900         } else {
3901                 if (from == SCTP_ADDR_IS_CONFIRMED)
3902                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3903                         net->dest_state = SCTP_ADDR_REACHABLE;
3904                 else
3905                         net->dest_state = SCTP_ADDR_REACHABLE |
3906                             SCTP_ADDR_UNCONFIRMED;
3907         }
3908         /*
3909          * We set this to 0, the timer code knows that this means its an
3910          * initial value
3911          */
3912         net->rto_needed = 1;
3913         net->RTO = 0;
3914         net->RTO_measured = 0;
3915         stcb->asoc.numnets++;
3916         net->ref_count = 1;
3917         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3918         net->port = port;
3919         net->dscp = stcb->asoc.default_dscp;
3920 #ifdef INET6
3921         net->flowlabel = stcb->asoc.default_flowlabel;
3922 #endif
3923         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3924                 net->dest_state |= SCTP_ADDR_NOHB;
3925         } else {
3926                 net->dest_state &= ~SCTP_ADDR_NOHB;
3927         }
3928         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3929                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3930         } else {
3931                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3932         }
3933         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3934         /* Init the timer structure */
3935         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3936         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3937         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3938
3939         /* Now generate a route for this guy */
3940 #ifdef INET6
3941         /* KAME hack: embed scopeid */
3942         if (newaddr->sa_family == AF_INET6) {
3943                 struct sockaddr_in6 *sin6;
3944
3945                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3946                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3947                 sin6->sin6_scope_id = 0;
3948         }
3949 #endif
3950         SCTP_RTALLOC((sctp_route_t *)&net->ro,
3951             stcb->asoc.vrf_id,
3952             stcb->sctp_ep->fibnum);
3953
3954         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3955                 /* Get source address */
3956                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3957                     stcb,
3958                     (sctp_route_t *)&net->ro,
3959                     net,
3960                     0,
3961                     stcb->asoc.vrf_id);
3962                 if (net->ro._s_addr != NULL) {
3963                         net->src_addr_selected = 1;
3964                         /* Now get the interface MTU */
3965                         if (net->ro._s_addr->ifn_p != NULL) {
3966                                 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3967                         }
3968                 } else {
3969                         net->src_addr_selected = 0;
3970                 }
3971                 if (net->mtu > 0) {
3972                         uint32_t rmtu;
3973
3974                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3975                         if (rmtu == 0) {
3976                                 /*
3977                                  * Start things off to match mtu of
3978                                  * interface please.
3979                                  */
3980                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3981                                     net->ro.ro_rt, net->mtu);
3982                         } else {
3983                                 /*
3984                                  * we take the route mtu over the interface,
3985                                  * since the route may be leading out the
3986                                  * loopback, or a different interface.
3987                                  */
3988                                 net->mtu = rmtu;
3989                         }
3990                 }
3991         } else {
3992                 net->src_addr_selected = 0;
3993         }
3994         if (net->mtu == 0) {
3995                 switch (newaddr->sa_family) {
3996 #ifdef INET
3997                 case AF_INET:
3998                         net->mtu = SCTP_DEFAULT_MTU;
3999                         break;
4000 #endif
4001 #ifdef INET6
4002                 case AF_INET6:
4003                         net->mtu = 1280;
4004                         break;
4005 #endif
4006                 default:
4007                         break;
4008                 }
4009         }
4010 #if defined(INET) || defined(INET6)
4011         if (net->port) {
4012                 net->mtu -= (uint32_t)sizeof(struct udphdr);
4013         }
4014 #endif
4015         if (from == SCTP_ALLOC_ASOC) {
4016                 stcb->asoc.smallest_mtu = net->mtu;
4017         }
4018         if (stcb->asoc.smallest_mtu > net->mtu) {
4019                 sctp_pathmtu_adjustment(stcb, net->mtu);
4020         }
4021 #ifdef INET6
4022         if (newaddr->sa_family == AF_INET6) {
4023                 struct sockaddr_in6 *sin6;
4024
4025                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4026                 (void)sa6_recoverscope(sin6);
4027         }
4028 #endif
4029
4030         /* JRS - Use the congestion control given in the CC module */
4031         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4032                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4033
4034         /*
4035          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4036          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4037          */
4038         net->find_pseudo_cumack = 1;
4039         net->find_rtx_pseudo_cumack = 1;
4040         /* Choose an initial flowid. */
4041         net->flowid = stcb->asoc.my_vtag ^
4042             ntohs(stcb->rport) ^
4043             ntohs(stcb->sctp_ep->sctp_lport);
4044         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4045         if (netp) {
4046                 *netp = net;
4047         }
4048         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4049         if (net->ro.ro_rt == NULL) {
4050                 /* Since we have no route put it at the back */
4051                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4052         } else if (netfirst == NULL) {
4053                 /* We are the first one in the pool. */
4054                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4055         } else if (netfirst->ro.ro_rt == NULL) {
4056                 /*
4057                  * First one has NO route. Place this one ahead of the first
4058                  * one.
4059                  */
4060                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4061         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4062                 /*
4063                  * This one has a different interface than the one at the
4064                  * top of the list. Place it ahead.
4065                  */
4066                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4067         } else {
4068                 /*
4069                  * Ok we have the same interface as the first one. Move
4070                  * forward until we find either a) one with a NULL route...
4071                  * insert ahead of that b) one with a different ifp.. insert
4072                  * after that. c) end of the list.. insert at the tail.
4073                  */
4074                 struct sctp_nets *netlook;
4075
4076                 do {
4077                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4078                         if (netlook == NULL) {
4079                                 /* End of the list */
4080                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4081                                 break;
4082                         } else if (netlook->ro.ro_rt == NULL) {
4083                                 /* next one has NO route */
4084                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4085                                 break;
4086                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4087                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4088                                     net, sctp_next);
4089                                 break;
4090                         }
4091                         /* Shift forward */
4092                         netfirst = netlook;
4093                 } while (netlook != NULL);
4094         }
4095
4096         /* got to have a primary set */
4097         if (stcb->asoc.primary_destination == 0) {
4098                 stcb->asoc.primary_destination = net;
4099         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4100                     (net->ro.ro_rt) &&
4101             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4102                 /* No route to current primary adopt new primary */
4103                 stcb->asoc.primary_destination = net;
4104         }
4105         /* Validate primary is first */
4106         net = TAILQ_FIRST(&stcb->asoc.nets);
4107         if ((net != stcb->asoc.primary_destination) &&
4108             (stcb->asoc.primary_destination)) {
4109                 /*
4110                  * first one on the list is NOT the primary sctp_cmpaddr()
4111                  * is much more efficient if the primary is the first on the
4112                  * list, make it so.
4113                  */
4114                 TAILQ_REMOVE(&stcb->asoc.nets,
4115                     stcb->asoc.primary_destination, sctp_next);
4116                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4117                     stcb->asoc.primary_destination, sctp_next);
4118         }
4119         return (0);
4120 }
4121
4122
4123 static uint32_t
4124 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4125 {
4126         uint32_t id;
4127         struct sctpasochead *head;
4128         struct sctp_tcb *lstcb;
4129
4130         SCTP_INP_WLOCK(inp);
4131 try_again:
4132         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4133                 /* TSNH */
4134                 SCTP_INP_WUNLOCK(inp);
4135                 return (0);
4136         }
4137         /*
4138          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4139          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4140          */
4141         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4142                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4143         }
4144         id = inp->sctp_associd_counter;
4145         inp->sctp_associd_counter++;
4146         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4147         if (lstcb) {
4148                 goto try_again;
4149         }
4150         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4151         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4152         stcb->asoc.in_asocid_hash = 1;
4153         SCTP_INP_WUNLOCK(inp);
4154         return id;
4155 }
4156
4157 /*
4158  * allocate an association and add it to the endpoint. The caller must be
4159  * careful to add all additional addresses once they are know right away or
4160  * else the assoc will be may experience a blackout scenario.
4161  */
4162 struct sctp_tcb *
4163 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4164     int *error, uint32_t override_tag, uint32_t vrf_id,
4165     uint16_t o_streams, uint16_t port,
4166     struct thread *p
4167 )
4168 {
4169         /* note the p argument is only valid in unbound sockets */
4170
4171         struct sctp_tcb *stcb;
4172         struct sctp_association *asoc;
4173         struct sctpasochead *head;
4174         uint16_t rport;
4175         int err;
4176
4177         /*
4178          * Assumption made here: Caller has done a
4179          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4180          * address does not exist already.
4181          */
4182         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4183                 /* Hit max assoc, sorry no more */
4184                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4185                 *error = ENOBUFS;
4186                 return (NULL);
4187         }
4188         if (firstaddr == NULL) {
4189                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4190                 *error = EINVAL;
4191                 return (NULL);
4192         }
4193         SCTP_INP_RLOCK(inp);
4194         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4195             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4196             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4197                 /*
4198                  * If its in the TCP pool, its NOT allowed to create an
4199                  * association. The parent listener needs to call
4200                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4201                  * off, or connected one does this.. its an error.
4202                  */
4203                 SCTP_INP_RUNLOCK(inp);
4204                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4205                 *error = EINVAL;
4206                 return (NULL);
4207         }
4208         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4209             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4210                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4211                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4212                         SCTP_INP_RUNLOCK(inp);
4213                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4214                         *error = EINVAL;
4215                         return (NULL);
4216                 }
4217         }
4218         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4219 #ifdef SCTP_DEBUG
4220         if (firstaddr) {
4221                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4222                 switch (firstaddr->sa_family) {
4223 #ifdef INET
4224                 case AF_INET:
4225                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4226                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4227                         break;
4228 #endif
4229 #ifdef INET6
4230                 case AF_INET6:
4231                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4232                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4233                         break;
4234 #endif
4235                 default:
4236                         break;
4237                 }
4238         } else {
4239                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4240         }
4241 #endif                          /* SCTP_DEBUG */
4242         switch (firstaddr->sa_family) {
4243 #ifdef INET
4244         case AF_INET:
4245                 {
4246                         struct sockaddr_in *sin;
4247
4248                         sin = (struct sockaddr_in *)firstaddr;
4249                         if ((ntohs(sin->sin_port) == 0) ||
4250                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4251                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4252                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4253                                 /* Invalid address */
4254                                 SCTP_INP_RUNLOCK(inp);
4255                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4256                                 *error = EINVAL;
4257                                 return (NULL);
4258                         }
4259                         rport = sin->sin_port;
4260                         break;
4261                 }
4262 #endif
4263 #ifdef INET6
4264         case AF_INET6:
4265                 {
4266                         struct sockaddr_in6 *sin6;
4267
4268                         sin6 = (struct sockaddr_in6 *)firstaddr;
4269                         if ((ntohs(sin6->sin6_port) == 0) ||
4270                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4271                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4272                                 /* Invalid address */
4273                                 SCTP_INP_RUNLOCK(inp);
4274                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4275                                 *error = EINVAL;
4276                                 return (NULL);
4277                         }
4278                         rport = sin6->sin6_port;
4279                         break;
4280                 }
4281 #endif
4282         default:
4283                 /* not supported family type */
4284                 SCTP_INP_RUNLOCK(inp);
4285                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4286                 *error = EINVAL;
4287                 return (NULL);
4288         }
4289         SCTP_INP_RUNLOCK(inp);
4290         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4291                 /*
4292                  * If you have not performed a bind, then we need to do the
4293                  * ephemeral bind for you.
4294                  */
4295                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4296                     (struct sockaddr *)NULL,
4297                     (struct sctp_ifa *)NULL,
4298                     p
4299                     ))) {
4300                         /* bind error, probably perm */
4301                         *error = err;
4302                         return (NULL);
4303                 }
4304         }
4305         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4306         if (stcb == NULL) {
4307                 /* out of memory? */
4308                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4309                 *error = ENOMEM;
4310                 return (NULL);
4311         }
4312         SCTP_INCR_ASOC_COUNT();
4313
4314         bzero(stcb, sizeof(*stcb));
4315         asoc = &stcb->asoc;
4316
4317         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4318         SCTP_TCB_LOCK_INIT(stcb);
4319         SCTP_TCB_SEND_LOCK_INIT(stcb);
4320         stcb->rport = rport;
4321         /* setup back pointer's */
4322         stcb->sctp_ep = inp;
4323         stcb->sctp_socket = inp->sctp_socket;
4324         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4325                 /* failed */
4326                 SCTP_TCB_LOCK_DESTROY(stcb);
4327                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4328                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4329                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4330                 SCTP_DECR_ASOC_COUNT();
4331                 *error = err;
4332                 return (NULL);
4333         }
4334         /* and the port */
4335         SCTP_INP_INFO_WLOCK();
4336         SCTP_INP_WLOCK(inp);
4337         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4338                 /* inpcb freed while alloc going on */
4339                 SCTP_TCB_LOCK_DESTROY(stcb);
4340                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4341                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4342                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4343                 SCTP_INP_WUNLOCK(inp);
4344                 SCTP_INP_INFO_WUNLOCK();
4345                 SCTP_DECR_ASOC_COUNT();
4346                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4347                 *error = EINVAL;
4348                 return (NULL);
4349         }
4350         SCTP_TCB_LOCK(stcb);
4351
4352         /* now that my_vtag is set, add it to the hash */
4353         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4354         /* put it in the bucket in the vtag hash of assoc's for the system */
4355         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4356         SCTP_INP_INFO_WUNLOCK();
4357
4358         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4359                 /* failure.. memory error? */
4360                 if (asoc->strmout) {
4361                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4362                         asoc->strmout = NULL;
4363                 }
4364                 if (asoc->mapping_array) {
4365                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4366                         asoc->mapping_array = NULL;
4367                 }
4368                 if (asoc->nr_mapping_array) {
4369                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4370                         asoc->nr_mapping_array = NULL;
4371                 }
4372                 SCTP_DECR_ASOC_COUNT();
4373                 SCTP_TCB_UNLOCK(stcb);
4374                 SCTP_TCB_LOCK_DESTROY(stcb);
4375                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4376                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4377                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4378                 SCTP_INP_WUNLOCK(inp);
4379                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4380                 *error = ENOBUFS;
4381                 return (NULL);
4382         }
4383         /* Init all the timers */
4384         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4385         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4386         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4387         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4388         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4389         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4390         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4391
4392         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4393         /* now file the port under the hash as well */
4394         if (inp->sctp_tcbhash != NULL) {
4395                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4396                     inp->sctp_hashmark)];
4397                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4398         }
4399         SCTP_INP_WUNLOCK(inp);
4400         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4401         return (stcb);
4402 }
4403
4404
4405 void
4406 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4407 {
4408         struct sctp_association *asoc;
4409
4410         asoc = &stcb->asoc;
4411         asoc->numnets--;
4412         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4413         if (net == asoc->primary_destination) {
4414                 /* Reset primary */
4415                 struct sctp_nets *lnet;
4416
4417                 lnet = TAILQ_FIRST(&asoc->nets);
4418                 /*
4419                  * Mobility adaptation Ideally, if deleted destination is
4420                  * the primary, it becomes a fast retransmission trigger by
4421                  * the subsequent SET PRIMARY. (by micchie)
4422                  */
4423                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4424                     SCTP_MOBILITY_BASE) ||
4425                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4426                     SCTP_MOBILITY_FASTHANDOFF)) {
4427                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4428                         if (asoc->deleted_primary != NULL) {
4429                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4430                                 goto out;
4431                         }
4432                         asoc->deleted_primary = net;
4433                         atomic_add_int(&net->ref_count, 1);
4434                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4435                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4436                         sctp_mobility_feature_on(stcb->sctp_ep,
4437                             SCTP_MOBILITY_PRIM_DELETED);
4438                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4439                             stcb->sctp_ep, stcb, NULL);
4440                 }
4441 out:
4442                 /* Try to find a confirmed primary */
4443                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4444         }
4445         if (net == asoc->last_data_chunk_from) {
4446                 /* Reset primary */
4447                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4448         }
4449         if (net == asoc->last_control_chunk_from) {
4450                 /* Clear net */
4451                 asoc->last_control_chunk_from = NULL;
4452         }
4453         if (net == stcb->asoc.alternate) {
4454                 sctp_free_remote_addr(stcb->asoc.alternate);
4455                 stcb->asoc.alternate = NULL;
4456         }
4457         sctp_free_remote_addr(net);
4458 }
4459
4460 /*
4461  * remove a remote endpoint address from an association, it will fail if the
4462  * address does not exist.
4463  */
4464 int
4465 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4466 {
4467         /*
4468          * Here we need to remove a remote address. This is quite simple, we
4469          * first find it in the list of address for the association
4470          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4471          * on that item. Note we do not allow it to be removed if there are
4472          * no other addresses.
4473          */
4474         struct sctp_association *asoc;
4475         struct sctp_nets *net, *nnet;
4476
4477         asoc = &stcb->asoc;
4478
4479         /* locate the address */
4480         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4481                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4482                         continue;
4483                 }
4484                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4485                     remaddr)) {
4486                         /* we found the guy */
4487                         if (asoc->numnets < 2) {
4488                                 /* Must have at LEAST two remote addresses */
4489                                 return (-1);
4490                         } else {
4491                                 sctp_remove_net(stcb, net);
4492                                 return (0);
4493                         }
4494                 }
4495         }
4496         /* not found. */
4497         return (-2);
4498 }
4499
4500 void
4501 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4502 {
4503         struct sctpvtaghead *chain;
4504         struct sctp_tagblock *twait_block;
4505         int found = 0;
4506         int i;
4507
4508         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4509         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4510                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4511                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4512                             (twait_block->vtag_block[i].lport == lport) &&
4513                             (twait_block->vtag_block[i].rport == rport)) {
4514                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4515                                 twait_block->vtag_block[i].v_tag = 0;
4516                                 twait_block->vtag_block[i].lport = 0;
4517                                 twait_block->vtag_block[i].rport = 0;
4518                                 found = 1;
4519                                 break;
4520                         }
4521                 }
4522                 if (found)
4523                         break;
4524         }
4525 }
4526
4527 int
4528 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4529 {
4530         struct sctpvtaghead *chain;
4531         struct sctp_tagblock *twait_block;
4532         int found = 0;
4533         int i;
4534
4535         SCTP_INP_INFO_WLOCK();
4536         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4537         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4538                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4539                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4540                             (twait_block->vtag_block[i].lport == lport) &&
4541                             (twait_block->vtag_block[i].rport == rport)) {
4542                                 found = 1;
4543                                 break;
4544                         }
4545                 }
4546                 if (found)
4547                         break;
4548         }
4549         SCTP_INP_INFO_WUNLOCK();
4550         return (found);
4551 }
4552
4553
4554 void
4555 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4556 {
4557         struct sctpvtaghead *chain;
4558         struct sctp_tagblock *twait_block;
4559         struct timeval now;
4560         int set, i;
4561
4562         if (time == 0) {
4563                 /* Its disabled */
4564                 return;
4565         }
4566         (void)SCTP_GETTIME_TIMEVAL(&now);
4567         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4568         set = 0;
4569         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4570                 /* Block(s) present, lets find space, and expire on the fly */
4571                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4572                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4573                             !set) {
4574                                 twait_block->vtag_block[i].tv_sec_at_expire =
4575                                     now.tv_sec + time;
4576                                 twait_block->vtag_block[i].v_tag = tag;
4577                                 twait_block->vtag_block[i].lport = lport;
4578                                 twait_block->vtag_block[i].rport = rport;
4579                                 set = 1;
4580                         } else if ((twait_block->vtag_block[i].v_tag) &&
4581                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4582                                 /* Audit expires this guy */
4583                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4584                                 twait_block->vtag_block[i].v_tag = 0;
4585                                 twait_block->vtag_block[i].lport = 0;
4586                                 twait_block->vtag_block[i].rport = 0;
4587                                 if (set == 0) {
4588                                         /* Reuse it for my new tag */
4589                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4590                                         twait_block->vtag_block[i].v_tag = tag;
4591                                         twait_block->vtag_block[i].lport = lport;
4592                                         twait_block->vtag_block[i].rport = rport;
4593                                         set = 1;
4594                                 }
4595                         }
4596                 }
4597                 if (set) {
4598                         /*
4599                          * We only do up to the block where we can place our
4600                          * tag for audits
4601                          */
4602                         break;
4603                 }
4604         }
4605         /* Need to add a new block to chain */
4606         if (!set) {
4607                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4608                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4609                 if (twait_block == NULL) {
4610 #ifdef INVARIANTS
4611                         panic("Can not alloc tagblock");
4612 #endif
4613                         return;
4614                 }
4615                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4616                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4617                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4618                 twait_block->vtag_block[0].v_tag = tag;
4619                 twait_block->vtag_block[0].lport = lport;
4620                 twait_block->vtag_block[0].rport = rport;
4621         }
4622 }
4623
4624 void
4625 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4626 {
4627         struct sctp_tmit_chunk *chk, *nchk;
4628         struct sctp_queued_to_read *ctl, *nctl;
4629
4630         TAILQ_FOREACH_SAFE(ctl, rh, next_instrm, nctl) {
4631                 TAILQ_REMOVE(rh, ctl, next_instrm);
4632                 ctl->on_strm_q = 0;
4633                 if (ctl->on_read_q == 0) {
4634                         sctp_free_remote_addr(ctl->whoFrom);
4635                         if (ctl->data) {
4636                                 sctp_m_freem(ctl->data);
4637                                 ctl->data = NULL;
4638                         }
4639                 }
4640                 /* Reassembly free? */
4641                 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
4642                         TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
4643                         if (chk->data) {
4644                                 sctp_m_freem(chk->data);
4645                                 chk->data = NULL;
4646                         }
4647                         if (chk->holds_key_ref)
4648                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4649                         sctp_free_remote_addr(chk->whoTo);
4650                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4651                         SCTP_DECR_CHK_COUNT();
4652                         /* sa_ignore FREED_MEMORY */
4653                 }
4654                 /*
4655                  * We don't free the address here since all the net's were
4656                  * freed above.
4657                  */
4658                 if (ctl->on_read_q == 0) {
4659                         sctp_free_a_readq(stcb, ctl);
4660                 }
4661         }
4662 }
4663
4664
4665 /*-
4666  * Free the association after un-hashing the remote port. This
4667  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4668  * expect that the input to this function IS a locked TCB.
4669  * It will return 0, if it did NOT destroy the association (instead
4670  * it unlocks it. It will return NON-zero if it either destroyed the
4671  * association OR the association is already destroyed.
4672  */
4673 int
4674 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4675 {
4676         int i;
4677         struct sctp_association *asoc;
4678         struct sctp_nets *net, *nnet;
4679         struct sctp_laddr *laddr, *naddr;
4680         struct sctp_tmit_chunk *chk, *nchk;
4681         struct sctp_asconf_addr *aparam, *naparam;
4682         struct sctp_asconf_ack *aack, *naack;
4683         struct sctp_stream_reset_list *strrst, *nstrrst;
4684         struct sctp_queued_to_read *sq, *nsq;
4685         struct sctp_stream_queue_pending *sp, *nsp;
4686         sctp_sharedkey_t *shared_key, *nshared_key;
4687         struct socket *so;
4688
4689         /* first, lets purge the entry from the hash table. */
4690
4691 #ifdef SCTP_LOG_CLOSING
4692         sctp_log_closing(inp, stcb, 6);
4693 #endif
4694         if (stcb->asoc.state == 0) {
4695 #ifdef SCTP_LOG_CLOSING
4696                 sctp_log_closing(inp, NULL, 7);
4697 #endif
4698                 /* there is no asoc, really TSNH :-0 */
4699                 return (1);
4700         }
4701         if (stcb->asoc.alternate) {
4702                 sctp_free_remote_addr(stcb->asoc.alternate);
4703                 stcb->asoc.alternate = NULL;
4704         }
4705         /* TEMP CODE */
4706         if (stcb->freed_from_where == 0) {
4707                 /* Only record the first place free happened from */
4708                 stcb->freed_from_where = from_location;
4709         }
4710         /* TEMP CODE */
4711
4712         asoc = &stcb->asoc;
4713         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4714             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4715                 /* nothing around */
4716                 so = NULL;
4717         else
4718                 so = inp->sctp_socket;
4719
4720         /*
4721          * We used timer based freeing if a reader or writer is in the way.
4722          * So we first check if we are actually being called from a timer,
4723          * if so we abort early if a reader or writer is still in the way.
4724          */
4725         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4726             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4727                 /*
4728                  * is it the timer driving us? if so are the reader/writers
4729                  * gone?
4730                  */
4731                 if (stcb->asoc.refcnt) {
4732                         /* nope, reader or writer in the way */
4733                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4734                         /* no asoc destroyed */
4735                         SCTP_TCB_UNLOCK(stcb);
4736 #ifdef SCTP_LOG_CLOSING
4737                         sctp_log_closing(inp, stcb, 8);
4738 #endif
4739                         return (0);
4740                 }
4741         }
4742         /* now clean up any other timers */
4743         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4744         asoc->dack_timer.self = NULL;
4745         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4746         /*-
4747          * For stream reset we don't blast this unless
4748          * it is a str-reset timer, it might be the
4749          * free-asoc timer which we DON'T want to
4750          * disturb.
4751          */
4752         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4753                 asoc->strreset_timer.self = NULL;
4754         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4755         asoc->asconf_timer.self = NULL;
4756         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4757         asoc->autoclose_timer.self = NULL;
4758         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4759         asoc->shut_guard_timer.self = NULL;
4760         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4761         asoc->delayed_event_timer.self = NULL;
4762         /* Mobility adaptation */
4763         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4764         asoc->delete_prim_timer.self = NULL;
4765         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4766                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4767                 net->rxt_timer.self = NULL;
4768                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4769                 net->pmtu_timer.self = NULL;
4770                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4771                 net->hb_timer.self = NULL;
4772         }
4773         /* Now the read queue needs to be cleaned up (only once) */
4774         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4775                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4776                 SCTP_INP_READ_LOCK(inp);
4777                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4778                         if (sq->stcb == stcb) {
4779                                 sq->do_not_ref_stcb = 1;
4780                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4781                                 /*
4782                                  * If there is no end, there never will be
4783                                  * now.
4784                                  */
4785                                 if (sq->end_added == 0) {
4786                                         /* Held for PD-API clear that. */
4787                                         sq->pdapi_aborted = 1;
4788                                         sq->held_length = 0;
4789                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4790                                                 /*
4791                                                  * Need to add a PD-API
4792                                                  * aborted indication.
4793                                                  * Setting the control_pdapi
4794                                                  * assures that it will be
4795                                                  * added right after this
4796                                                  * msg.
4797                                                  */
4798                                                 uint32_t strseq;
4799
4800                                                 stcb->asoc.control_pdapi = sq;
4801                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4802                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4803                                                     stcb,
4804                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4805                                                     (void *)&strseq,
4806                                                     SCTP_SO_LOCKED);
4807                                                 stcb->asoc.control_pdapi = NULL;
4808                                         }
4809                                 }
4810                                 /* Add an end to wake them */
4811                                 sq->end_added = 1;
4812                         }
4813                 }
4814                 SCTP_INP_READ_UNLOCK(inp);
4815                 if (stcb->block_entry) {
4816                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4817                         stcb->block_entry->error = ECONNRESET;
4818                         stcb->block_entry = NULL;
4819                 }
4820         }
4821         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4822                 /*
4823                  * Someone holds a reference OR the socket is unaccepted
4824                  * yet.
4825                  */
4826                 if ((stcb->asoc.refcnt) ||
4827                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4828                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4829                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4830                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4831                 }
4832                 SCTP_TCB_UNLOCK(stcb);
4833                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4834                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4835                         /* nothing around */
4836                         so = NULL;
4837                 if (so) {
4838                         /* Wake any reader/writers */
4839                         sctp_sorwakeup(inp, so);
4840                         sctp_sowwakeup(inp, so);
4841                 }
4842 #ifdef SCTP_LOG_CLOSING
4843                 sctp_log_closing(inp, stcb, 9);
4844 #endif
4845                 /* no asoc destroyed */
4846                 return (0);
4847         }
4848 #ifdef SCTP_LOG_CLOSING
4849         sctp_log_closing(inp, stcb, 10);
4850 #endif
4851         /*
4852          * When I reach here, no others want to kill the assoc yet.. and I
4853          * own the lock. Now its possible an abort comes in when I do the
4854          * lock exchange below to grab all the locks to do the final take
4855          * out. to prevent this we increment the count, which will start a
4856          * timer and blow out above thus assuring us that we hold exclusive
4857          * killing of the asoc. Note that after getting back the TCB lock we
4858          * will go ahead and increment the counter back up and stop any
4859          * timer a passing stranger may have started :-S
4860          */
4861         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4862                 atomic_add_int(&stcb->asoc.refcnt, 1);
4863
4864                 SCTP_TCB_UNLOCK(stcb);
4865                 SCTP_INP_INFO_WLOCK();
4866                 SCTP_INP_WLOCK(inp);
4867                 SCTP_TCB_LOCK(stcb);
4868         }
4869         /* Double check the GONE flag */
4870         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4871             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4872                 /* nothing around */
4873                 so = NULL;
4874
4875         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4876             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4877                 /*
4878                  * For TCP type we need special handling when we are
4879                  * connected. We also include the peel'ed off ones to.
4880                  */
4881                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4882                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4883                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4884                         if (so) {
4885                                 SOCK_LOCK(so);
4886                                 if (so->so_rcv.sb_cc == 0) {
4887                                         so->so_state &= ~(SS_ISCONNECTING |
4888                                             SS_ISDISCONNECTING |
4889                                             SS_ISCONFIRMING |
4890                                             SS_ISCONNECTED);
4891                                 }
4892                                 socantrcvmore_locked(so);
4893                                 socantsendmore(so);
4894                                 sctp_sowwakeup(inp, so);
4895                                 sctp_sorwakeup(inp, so);
4896                                 SCTP_SOWAKEUP(so);
4897                         }
4898                 }
4899         }
4900         /*
4901          * Make it invalid too, that way if its about to run it will abort
4902          * and return.
4903          */
4904         /* re-increment the lock */
4905         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4906                 atomic_add_int(&stcb->asoc.refcnt, -1);
4907         }
4908         if (stcb->asoc.refcnt) {
4909                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4910                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4911                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4912                         SCTP_INP_INFO_WUNLOCK();
4913                         SCTP_INP_WUNLOCK(inp);
4914                 }
4915                 SCTP_TCB_UNLOCK(stcb);
4916                 return (0);
4917         }
4918         asoc->state = 0;
4919         if (inp->sctp_tcbhash) {
4920                 LIST_REMOVE(stcb, sctp_tcbhash);
4921         }
4922         if (stcb->asoc.in_asocid_hash) {
4923                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4924         }
4925         /* Now lets remove it from the list of ALL associations in the EP */
4926         LIST_REMOVE(stcb, sctp_tcblist);
4927         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4928                 SCTP_INP_INCR_REF(inp);
4929                 SCTP_INP_WUNLOCK(inp);
4930         }
4931         /* pull from vtag hash */
4932         LIST_REMOVE(stcb, sctp_asocs);
4933         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4934             inp->sctp_lport, stcb->rport);
4935
4936         /*
4937          * Now restop the timers to be sure this is paranoia at is finest!
4938          */
4939         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4940         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4941         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4942         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4943         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4944         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4945         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4946         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4947                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4948                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4949                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4950         }
4951
4952         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4953         /*
4954          * The chunk lists and such SHOULD be empty but we check them just
4955          * in case.
4956          */
4957         /* anything on the wheel needs to be removed */
4958         for (i = 0; i < asoc->streamoutcnt; i++) {
4959                 struct sctp_stream_out *outs;
4960
4961                 outs = &asoc->strmout[i];
4962                 /* now clean up any chunks here */
4963                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4964                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4965                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4966                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0);
4967                         sctp_free_spbufspace(stcb, asoc, sp);
4968                         if (sp->data) {
4969                                 if (so) {
4970                                         /* Still an open socket - report */
4971                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4972                                             0, (void *)sp, SCTP_SO_LOCKED);
4973                                 }
4974                                 if (sp->data) {
4975                                         sctp_m_freem(sp->data);
4976                                         sp->data = NULL;
4977                                         sp->tail_mbuf = NULL;
4978                                         sp->length = 0;
4979                                 }
4980                         }
4981                         if (sp->net) {
4982                                 sctp_free_remote_addr(sp->net);
4983                                 sp->net = NULL;
4984                         }
4985                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4986                 }
4987         }
4988         /* sa_ignore FREED_MEMORY */
4989         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4990                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4991                 SCTP_FREE(strrst, SCTP_M_STRESET);
4992         }
4993         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4994                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4995                 if (sq->data) {
4996                         sctp_m_freem(sq->data);
4997                         sq->data = NULL;
4998                 }
4999                 sctp_free_remote_addr(sq->whoFrom);
5000                 sq->whoFrom = NULL;
5001                 sq->stcb = NULL;
5002                 /* Free the ctl entry */
5003                 sctp_free_a_readq(stcb, sq);
5004                 /* sa_ignore FREED_MEMORY */
5005         }
5006         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5007                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5008                 if (chk->data) {
5009                         sctp_m_freem(chk->data);
5010                         chk->data = NULL;
5011                 }
5012                 if (chk->holds_key_ref)
5013                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5014                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5015                 SCTP_DECR_CHK_COUNT();
5016                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5017                 asoc->free_chunk_cnt--;
5018                 /* sa_ignore FREED_MEMORY */
5019         }
5020         /* pending send queue SHOULD be empty */
5021         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5022                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5023                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5024 #ifdef INVARIANTS
5025                 } else {
5026                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5027 #endif
5028                 }
5029                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5030                 if (chk->data) {
5031                         if (so) {
5032                                 /* Still a socket? */
5033                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5034                                     0, chk, SCTP_SO_LOCKED);
5035                         }
5036                         if (chk->data) {
5037                                 sctp_m_freem(chk->data);
5038                                 chk->data = NULL;
5039                         }
5040                 }
5041                 if (chk->holds_key_ref)
5042                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5043                 if (chk->whoTo) {
5044                         sctp_free_remote_addr(chk->whoTo);
5045                         chk->whoTo = NULL;
5046                 }
5047                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5048                 SCTP_DECR_CHK_COUNT();
5049                 /* sa_ignore FREED_MEMORY */
5050         }
5051         /* sent queue SHOULD be empty */
5052         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5053                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5054                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5055                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5056 #ifdef INVARIANTS
5057                         } else {
5058                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5059 #endif
5060                         }
5061                 }
5062                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5063                 if (chk->data) {
5064                         if (so) {
5065                                 /* Still a socket? */
5066                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5067                                     0, chk, SCTP_SO_LOCKED);
5068                         }
5069                         if (chk->data) {
5070                                 sctp_m_freem(chk->data);
5071                                 chk->data = NULL;
5072                         }
5073                 }
5074                 if (chk->holds_key_ref)
5075                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5076                 sctp_free_remote_addr(chk->whoTo);
5077                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5078                 SCTP_DECR_CHK_COUNT();
5079                 /* sa_ignore FREED_MEMORY */
5080         }
5081 #ifdef INVARIANTS
5082         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5083                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5084                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5085                 }
5086         }
5087 #endif
5088         /* control queue MAY not be empty */
5089         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5090                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5091                 if (chk->data) {
5092                         sctp_m_freem(chk->data);
5093                         chk->data = NULL;
5094                 }
5095                 if (chk->holds_key_ref)
5096                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5097                 sctp_free_remote_addr(chk->whoTo);
5098                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5099                 SCTP_DECR_CHK_COUNT();
5100                 /* sa_ignore FREED_MEMORY */
5101         }
5102         /* ASCONF queue MAY not be empty */
5103         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5104                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5105                 if (chk->data) {
5106                         sctp_m_freem(chk->data);
5107                         chk->data = NULL;
5108                 }
5109                 if (chk->holds_key_ref)
5110                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5111                 sctp_free_remote_addr(chk->whoTo);
5112                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5113                 SCTP_DECR_CHK_COUNT();
5114                 /* sa_ignore FREED_MEMORY */
5115         }
5116         if (asoc->mapping_array) {
5117                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5118                 asoc->mapping_array = NULL;
5119         }
5120         if (asoc->nr_mapping_array) {
5121                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5122                 asoc->nr_mapping_array = NULL;
5123         }
5124         /* the stream outs */
5125         if (asoc->strmout) {
5126                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5127                 asoc->strmout = NULL;
5128         }
5129         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5130         if (asoc->strmin) {
5131                 for (i = 0; i < asoc->streamincnt; i++) {
5132                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5133                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5134                 }
5135                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5136                 asoc->strmin = NULL;
5137         }
5138         asoc->streamincnt = 0;
5139         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5140 #ifdef INVARIANTS
5141                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5142                         panic("no net's left alloc'ed, or list points to itself");
5143                 }
5144 #endif
5145                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5146                 sctp_free_remote_addr(net);
5147         }
5148         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5149                 /* sa_ignore FREED_MEMORY */
5150                 sctp_remove_laddr(laddr);
5151         }
5152
5153         /* pending asconf (address) parameters */
5154         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5155                 /* sa_ignore FREED_MEMORY */
5156                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5157                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5158         }
5159         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5160                 /* sa_ignore FREED_MEMORY */
5161                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5162                 if (aack->data != NULL) {
5163                         sctp_m_freem(aack->data);
5164                 }
5165                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5166         }
5167         /* clean up auth stuff */
5168         if (asoc->local_hmacs)
5169                 sctp_free_hmaclist(asoc->local_hmacs);
5170         if (asoc->peer_hmacs)
5171                 sctp_free_hmaclist(asoc->peer_hmacs);
5172
5173         if (asoc->local_auth_chunks)
5174                 sctp_free_chunklist(asoc->local_auth_chunks);
5175         if (asoc->peer_auth_chunks)
5176                 sctp_free_chunklist(asoc->peer_auth_chunks);
5177
5178         sctp_free_authinfo(&asoc->authinfo);
5179
5180         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5181                 LIST_REMOVE(shared_key, next);
5182                 sctp_free_sharedkey(shared_key);
5183                 /* sa_ignore FREED_MEMORY */
5184         }
5185
5186         /* Insert new items here :> */
5187
5188         /* Get rid of LOCK */
5189         SCTP_TCB_UNLOCK(stcb);
5190         SCTP_TCB_LOCK_DESTROY(stcb);
5191         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5192         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5193                 SCTP_INP_INFO_WUNLOCK();
5194                 SCTP_INP_RLOCK(inp);
5195         }
5196 #ifdef SCTP_TRACK_FREED_ASOCS
5197         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5198                 /* now clean up the tasoc itself */
5199                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5200                 SCTP_DECR_ASOC_COUNT();
5201         } else {
5202                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5203         }
5204 #else
5205         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5206         SCTP_DECR_ASOC_COUNT();
5207 #endif
5208         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5209                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5210                         /*
5211                          * If its NOT the inp_free calling us AND sctp_close
5212                          * as been called, we call back...
5213                          */
5214                         SCTP_INP_RUNLOCK(inp);
5215                         /*
5216                          * This will start the kill timer (if we are the
5217                          * last one) since we hold an increment yet. But
5218                          * this is the only safe way to do this since
5219                          * otherwise if the socket closes at the same time
5220                          * we are here we might collide in the cleanup.
5221                          */
5222                         sctp_inpcb_free(inp,
5223                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5224                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5225                         SCTP_INP_DECR_REF(inp);
5226                         goto out_of;
5227                 } else {
5228                         /* The socket is still open. */
5229                         SCTP_INP_DECR_REF(inp);
5230                 }
5231         }
5232         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5233                 SCTP_INP_RUNLOCK(inp);
5234         }
5235 out_of:
5236         /* destroyed the asoc */
5237 #ifdef SCTP_LOG_CLOSING
5238         sctp_log_closing(inp, NULL, 11);
5239 #endif
5240         return (1);
5241 }
5242
5243
5244
5245 /*
5246  * determine if a destination is "reachable" based upon the addresses bound
5247  * to the current endpoint (e.g. only v4 or v6 currently bound)
5248  */
5249 /*
5250  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5251  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5252  * types bound as its endpoint
5253  */
5254 int
5255 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5256 {
5257         struct sctp_inpcb *inp;
5258         int answer;
5259
5260         /*
5261          * No locks here, the TCB, in all cases is already locked and an
5262          * assoc is up. There is either a INP lock by the caller applied (in
5263          * asconf case when deleting an address) or NOT in the HB case,
5264          * however if HB then the INP increment is up and the INP will not
5265          * be removed (on top of the fact that we have a TCB lock). So we
5266          * only want to read the sctp_flags, which is either bound-all or
5267          * not.. no protection needed since once an assoc is up you can't be
5268          * changing your binding.
5269          */
5270         inp = stcb->sctp_ep;
5271         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5272                 /* if bound all, destination is not restricted */
5273                 /*
5274                  * RRS: Question during lock work: Is this correct? If you
5275                  * are bound-all you still might need to obey the V4--V6
5276                  * flags??? IMO this bound-all stuff needs to be removed!
5277                  */
5278                 return (1);
5279         }
5280         /* NOTE: all "scope" checks are done when local addresses are added */
5281         switch (destaddr->sa_family) {
5282 #ifdef INET6
5283         case AF_INET6:
5284                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5285                 break;
5286 #endif
5287 #ifdef INET
5288         case AF_INET:
5289                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5290                 break;
5291 #endif
5292         default:
5293                 /* invalid family, so it's unreachable */
5294                 answer = 0;
5295                 break;
5296         }
5297         return (answer);
5298 }
5299
5300 /*
5301  * update the inp_vflags on an endpoint
5302  */
5303 static void
5304 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5305 {
5306         struct sctp_laddr *laddr;
5307
5308         /* first clear the flag */
5309         inp->ip_inp.inp.inp_vflag = 0;
5310         /* set the flag based on addresses on the ep list */
5311         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5312                 if (laddr->ifa == NULL) {
5313                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5314                             __func__);
5315                         continue;
5316                 }
5317                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5318                         continue;
5319                 }
5320                 switch (laddr->ifa->address.sa.sa_family) {
5321 #ifdef INET6
5322                 case AF_INET6:
5323                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5324                         break;
5325 #endif
5326 #ifdef INET
5327                 case AF_INET:
5328                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5329                         break;
5330 #endif
5331                 default:
5332                         break;
5333                 }
5334         }
5335 }
5336
5337 /*
5338  * Add the address to the endpoint local address list There is nothing to be
5339  * done if we are bound to all addresses
5340  */
5341 void
5342 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5343 {
5344         struct sctp_laddr *laddr;
5345         struct sctp_tcb *stcb;
5346         int fnd, error = 0;
5347
5348         fnd = 0;
5349
5350         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5351                 /* You are already bound to all. You have it already */
5352                 return;
5353         }
5354 #ifdef INET6
5355         if (ifa->address.sa.sa_family == AF_INET6) {
5356                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5357                         /* Can't bind a non-useable addr. */
5358                         return;
5359                 }
5360         }
5361 #endif
5362         /* first, is it already present? */
5363         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5364                 if (laddr->ifa == ifa) {
5365                         fnd = 1;
5366                         break;
5367                 }
5368         }
5369
5370         if (fnd == 0) {
5371                 /* Not in the ep list */
5372                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5373                 if (error != 0)
5374                         return;
5375                 inp->laddr_count++;
5376                 /* update inp_vflag flags */
5377                 switch (ifa->address.sa.sa_family) {
5378 #ifdef INET6
5379                 case AF_INET6:
5380                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5381                         break;
5382 #endif
5383 #ifdef INET
5384                 case AF_INET:
5385                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5386                         break;
5387 #endif
5388                 default:
5389                         break;
5390                 }
5391                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5392                         sctp_add_local_addr_restricted(stcb, ifa);
5393                 }
5394         }
5395         return;
5396 }
5397
5398
5399 /*
5400  * select a new (hopefully reachable) destination net (should only be used
5401  * when we deleted an ep addr that is the only usable source address to reach
5402  * the destination net)
5403  */
5404 static void
5405 sctp_select_primary_destination(struct sctp_tcb *stcb)
5406 {
5407         struct sctp_nets *net;
5408
5409         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5410                 /* for now, we'll just pick the first reachable one we find */
5411                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5412                         continue;
5413                 if (sctp_destination_is_reachable(stcb,
5414                     (struct sockaddr *)&net->ro._l_addr)) {
5415                         /* found a reachable destination */
5416                         stcb->asoc.primary_destination = net;
5417                 }
5418         }
5419         /* I can't there from here! ...we're gonna die shortly... */
5420 }
5421
5422
5423 /*
5424  * Delete the address from the endpoint local address list. There is nothing
5425  * to be done if we are bound to all addresses
5426  */
5427 void
5428 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5429 {
5430         struct sctp_laddr *laddr;
5431         int fnd;
5432
5433         fnd = 0;
5434         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5435                 /* You are already bound to all. You have it already */
5436                 return;
5437         }
5438         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5439                 if (laddr->ifa == ifa) {
5440                         fnd = 1;
5441                         break;
5442                 }
5443         }
5444         if (fnd && (inp->laddr_count < 2)) {
5445                 /* can't delete unless there are at LEAST 2 addresses */
5446                 return;
5447         }
5448         if (fnd) {
5449                 /*
5450                  * clean up any use of this address go through our
5451                  * associations and clear any last_used_address that match
5452                  * this one for each assoc, see if a new primary_destination
5453                  * is needed
5454                  */
5455                 struct sctp_tcb *stcb;
5456
5457                 /* clean up "next_addr_touse" */
5458                 if (inp->next_addr_touse == laddr)
5459                         /* delete this address */
5460                         inp->next_addr_touse = NULL;
5461
5462                 /* clean up "last_used_address" */
5463                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5464                         struct sctp_nets *net;
5465
5466                         SCTP_TCB_LOCK(stcb);
5467                         if (stcb->asoc.last_used_address == laddr)
5468                                 /* delete this address */
5469                                 stcb->asoc.last_used_address = NULL;
5470                         /*
5471                          * Now spin through all the nets and purge any ref
5472                          * to laddr
5473                          */
5474                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5475                                 if (net->ro._s_addr == laddr->ifa) {
5476                                         /* Yep, purge src address selected */
5477                                         sctp_rtentry_t *rt;
5478
5479                                         /* delete this address if cached */
5480                                         rt = net->ro.ro_rt;
5481                                         if (rt != NULL) {
5482                                                 RTFREE(rt);
5483                                                 net->ro.ro_rt = NULL;
5484                                         }
5485                                         sctp_free_ifa(net->ro._s_addr);
5486                                         net->ro._s_addr = NULL;
5487                                         net->src_addr_selected = 0;
5488                                 }
5489                         }
5490                         SCTP_TCB_UNLOCK(stcb);
5491                 }               /* for each tcb */
5492                 /* remove it from the ep list */
5493                 sctp_remove_laddr(laddr);
5494                 inp->laddr_count--;
5495                 /* update inp_vflag flags */
5496                 sctp_update_ep_vflag(inp);
5497         }
5498         return;
5499 }
5500
5501 /*
5502  * Add the address to the TCB local address restricted list.
5503  * This is a "pending" address list (eg. addresses waiting for an
5504  * ASCONF-ACK response) and cannot be used as a valid source address.
5505  */
5506 void
5507 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5508 {
5509         struct sctp_laddr *laddr;
5510         struct sctpladdr *list;
5511
5512         /*
5513          * Assumes TCB is locked.. and possibly the INP. May need to
5514          * confirm/fix that if we need it and is not the case.
5515          */
5516         list = &stcb->asoc.sctp_restricted_addrs;
5517
5518 #ifdef INET6
5519         if (ifa->address.sa.sa_family == AF_INET6) {
5520                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5521                         /* Can't bind a non-existent addr. */
5522                         return;
5523                 }
5524         }
5525 #endif
5526         /* does the address already exist? */
5527         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5528                 if (laddr->ifa == ifa) {
5529                         return;
5530                 }
5531         }
5532
5533         /* add to the list */
5534         (void)sctp_insert_laddr(list, ifa, 0);
5535         return;
5536 }
5537
5538 /*
5539  * Remove a local address from the TCB local address restricted list
5540  */
5541 void
5542 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5543 {
5544         struct sctp_inpcb *inp;
5545         struct sctp_laddr *laddr;
5546
5547         /*
5548          * This is called by asconf work. It is assumed that a) The TCB is
5549          * locked and b) The INP is locked. This is true in as much as I can
5550          * trace through the entry asconf code where I did these locks.
5551          * Again, the ASCONF code is a bit different in that it does lock
5552          * the INP during its work often times. This must be since we don't
5553          * want other proc's looking up things while what they are looking
5554          * up is changing :-D
5555          */
5556
5557         inp = stcb->sctp_ep;
5558         /* if subset bound and don't allow ASCONF's, can't delete last */
5559         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5560             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5561                 if (stcb->sctp_ep->laddr_count < 2) {
5562                         /* can't delete last address */
5563                         return;
5564                 }
5565         }
5566         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5567                 /* remove the address if it exists */
5568                 if (laddr->ifa == NULL)
5569                         continue;
5570                 if (laddr->ifa == ifa) {
5571                         sctp_remove_laddr(laddr);
5572                         return;
5573                 }
5574         }
5575
5576         /* address not found! */
5577         return;
5578 }
5579
5580 /*
5581  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5582  */
5583 /* sysctl */
5584 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5585 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5586
5587
5588
5589 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5590 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5591 int *sctp_cpuarry = NULL;
5592 void
5593 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5594 {
5595         /* Queue a packet to a processor for the specified core */
5596         struct sctp_mcore_queue *qent;
5597         struct sctp_mcore_ctrl *wkq;
5598         int need_wake = 0;
5599
5600         if (sctp_mcore_workers == NULL) {
5601                 /* Something went way bad during setup */
5602                 sctp_input_with_port(m, off, 0);
5603                 return;
5604         }
5605         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5606             (sizeof(struct sctp_mcore_queue)),
5607             SCTP_M_MCORE);
5608         if (qent == NULL) {
5609                 /* This is trouble  */
5610                 sctp_input_with_port(m, off, 0);
5611                 return;
5612         }
5613         qent->vn = curvnet;
5614         qent->m = m;
5615         qent->off = off;
5616         qent->v6 = 0;
5617         wkq = &sctp_mcore_workers[cpu_to_use];
5618         SCTP_MCORE_QLOCK(wkq);
5619
5620         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5621         if (wkq->running == 0) {
5622                 need_wake = 1;
5623         }
5624         SCTP_MCORE_QUNLOCK(wkq);
5625         if (need_wake) {
5626                 wakeup(&wkq->running);
5627         }
5628 }
5629
5630 static void
5631 sctp_mcore_thread(void *arg)
5632 {
5633
5634         struct sctp_mcore_ctrl *wkq;
5635         struct sctp_mcore_queue *qent;
5636
5637         wkq = (struct sctp_mcore_ctrl *)arg;
5638         struct mbuf *m;
5639         int off, v6;
5640
5641         /* Wait for first tickle */
5642         SCTP_MCORE_LOCK(wkq);
5643         wkq->running = 0;
5644         msleep(&wkq->running,
5645             &wkq->core_mtx,
5646             0, "wait for pkt", 0);
5647         SCTP_MCORE_UNLOCK(wkq);
5648
5649         /* Bind to our cpu */
5650         thread_lock(curthread);
5651         sched_bind(curthread, wkq->cpuid);
5652         thread_unlock(curthread);
5653
5654         /* Now lets start working */
5655         SCTP_MCORE_LOCK(wkq);
5656         /* Now grab lock and go */
5657         for (;;) {
5658                 SCTP_MCORE_QLOCK(wkq);
5659 skip_sleep:
5660                 wkq->running = 1;
5661                 qent = TAILQ_FIRST(&wkq->que);
5662                 if (qent) {
5663                         TAILQ_REMOVE(&wkq->que, qent, next);
5664                         SCTP_MCORE_QUNLOCK(wkq);
5665                         CURVNET_SET(qent->vn);
5666                         m = qent->m;
5667                         off = qent->off;
5668                         v6 = qent->v6;
5669                         SCTP_FREE(qent, SCTP_M_MCORE);
5670                         if (v6 == 0) {
5671                                 sctp_input_with_port(m, off, 0);
5672                         } else {
5673                                 SCTP_PRINTF("V6 not yet supported\n");
5674                                 sctp_m_freem(m);
5675                         }
5676                         CURVNET_RESTORE();
5677                         SCTP_MCORE_QLOCK(wkq);
5678                 }
5679                 wkq->running = 0;
5680                 if (!TAILQ_EMPTY(&wkq->que)) {
5681                         goto skip_sleep;
5682                 }
5683                 SCTP_MCORE_QUNLOCK(wkq);
5684                 msleep(&wkq->running,
5685                     &wkq->core_mtx,
5686                     0, "wait for pkt", 0);
5687         }
5688 }
5689
5690 static void
5691 sctp_startup_mcore_threads(void)
5692 {
5693         int i, cpu;
5694
5695         if (mp_ncpus == 1)
5696                 return;
5697
5698         if (sctp_mcore_workers != NULL) {
5699                 /*
5700                  * Already been here in some previous vnet?
5701                  */
5702                 return;
5703         }
5704         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5705             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5706             SCTP_M_MCORE);
5707         if (sctp_mcore_workers == NULL) {
5708                 /* TSNH I hope */
5709                 return;
5710         }
5711         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5712             sizeof(struct sctp_mcore_ctrl)));
5713         /* Init the structures */
5714         for (i = 0; i <= mp_maxid; i++) {
5715                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5716                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5717                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5718                 sctp_mcore_workers[i].cpuid = i;
5719         }
5720         if (sctp_cpuarry == NULL) {
5721                 SCTP_MALLOC(sctp_cpuarry, int *,
5722                     (mp_ncpus * sizeof(int)),
5723                     SCTP_M_MCORE);
5724                 i = 0;
5725                 CPU_FOREACH(cpu) {
5726                         sctp_cpuarry[i] = cpu;
5727                         i++;
5728                 }
5729         }
5730         /* Now start them all */
5731         CPU_FOREACH(cpu) {
5732                 (void)kproc_create(sctp_mcore_thread,
5733                     (void *)&sctp_mcore_workers[cpu],
5734                     &sctp_mcore_workers[cpu].thread_proc,
5735                     RFPROC,
5736                     SCTP_KTHREAD_PAGES,
5737                     SCTP_MCORE_NAME);
5738
5739         }
5740 }
5741 #endif
5742
5743 void
5744 sctp_pcb_init()
5745 {
5746         /*
5747          * SCTP initialization for the PCB structures should be called by
5748          * the sctp_init() function.
5749          */
5750         int i;
5751         struct timeval tv;
5752
5753         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5754                 /* error I was called twice */
5755                 return;
5756         }
5757         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5758
5759 #if defined(SCTP_LOCAL_TRACE_BUF)
5760         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5761 #endif
5762 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5763         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5764             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5765             SCTP_M_MCORE);
5766 #endif
5767         (void)SCTP_GETTIME_TIMEVAL(&tv);
5768 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5769         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5770         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5771         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5772 #else
5773         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5774         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5775         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5776 #endif
5777         /* init the empty list of (All) Endpoints */
5778         LIST_INIT(&SCTP_BASE_INFO(listhead));
5779
5780
5781         /* init the hash table of endpoints */
5782         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5783         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5784         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5785         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5786             &SCTP_BASE_INFO(hashasocmark));
5787         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5788             &SCTP_BASE_INFO(hashmark));
5789         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5790             &SCTP_BASE_INFO(hashtcpmark));
5791         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5792
5793
5794         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5795             &SCTP_BASE_INFO(hashvrfmark));
5796
5797         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5798             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5799         /* init the zones */
5800         /*
5801          * FIX ME: Should check for NULL returns, but if it does fail we are
5802          * doomed to panic anyways... add later maybe.
5803          */
5804         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5805             sizeof(struct sctp_inpcb), maxsockets);
5806
5807         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5808             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5809
5810         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5811             sizeof(struct sctp_laddr),
5812             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5813
5814         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5815             sizeof(struct sctp_nets),
5816             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5817
5818         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5819             sizeof(struct sctp_tmit_chunk),
5820             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5821
5822         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5823             sizeof(struct sctp_queued_to_read),
5824             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5825
5826         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5827             sizeof(struct sctp_stream_queue_pending),
5828             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5829
5830         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5831             sizeof(struct sctp_asconf),
5832             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5833
5834         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5835             sizeof(struct sctp_asconf_ack),
5836             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5837
5838
5839         /* Master Lock INIT for info structure */
5840         SCTP_INP_INFO_LOCK_INIT();
5841         SCTP_STATLOG_INIT_LOCK();
5842
5843         SCTP_IPI_COUNT_INIT();
5844         SCTP_IPI_ADDR_INIT();
5845 #ifdef SCTP_PACKET_LOGGING
5846         SCTP_IP_PKTLOG_INIT();
5847 #endif
5848         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5849
5850         SCTP_WQ_ADDR_INIT();
5851         /* not sure if we need all the counts */
5852         SCTP_BASE_INFO(ipi_count_ep) = 0;
5853         /* assoc/tcb zone info */
5854         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5855         /* local addrlist zone info */
5856         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5857         /* remote addrlist zone info */
5858         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5859         /* chunk info */
5860         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5861
5862         /* socket queue zone info */
5863         SCTP_BASE_INFO(ipi_count_readq) = 0;
5864
5865         /* stream out queue cont */
5866         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5867
5868         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5869         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5870
5871         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5872
5873         /* Init the TIMEWAIT list */
5874         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5875                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5876         }
5877         sctp_startup_iterator();
5878
5879 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5880         sctp_startup_mcore_threads();
5881 #endif
5882
5883         /*
5884          * INIT the default VRF which for BSD is the only one, other O/S's
5885          * may have more. But initially they must start with one and then
5886          * add the VRF's as addresses are added.
5887          */
5888         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5889 }
5890
5891 /*
5892  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5893  */
5894 void
5895 sctp_pcb_finish(void)
5896 {
5897         struct sctp_vrflist *vrf_bucket;
5898         struct sctp_vrf *vrf, *nvrf;
5899         struct sctp_ifn *ifn, *nifn;
5900         struct sctp_ifa *ifa, *nifa;
5901         struct sctpvtaghead *chain;
5902         struct sctp_tagblock *twait_block, *prev_twait_block;
5903         struct sctp_laddr *wi, *nwi;
5904         int i;
5905         struct sctp_iterator *it, *nit;
5906
5907         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5908                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5909                 return;
5910         }
5911         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5912         /*
5913          * In FreeBSD the iterator thread never exits but we do clean up.
5914          * The only way FreeBSD reaches here is if we have VRF's but we
5915          * still add the ifdef to make it compile on old versions.
5916          */
5917 retry:
5918         SCTP_IPI_ITERATOR_WQ_LOCK();
5919         /*
5920          * sctp_iterator_worker() might be working on an it entry without
5921          * holding the lock.  We won't find it on the list either and
5922          * continue and free/destroy it.  While holding the lock, spin, to
5923          * avoid the race condition as sctp_iterator_worker() will have to
5924          * wait to re-aquire the lock.
5925          */
5926         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5927                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5928                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5929                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5930                 DELAY(10);
5931                 goto retry;
5932         }
5933         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5934                 if (it->vn != curvnet) {
5935                         continue;
5936                 }
5937                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5938                 if (it->function_atend != NULL) {
5939                         (*it->function_atend) (it->pointer, it->val);
5940                 }
5941                 SCTP_FREE(it, SCTP_M_ITER);
5942         }
5943         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5944         SCTP_ITERATOR_LOCK();
5945         if ((sctp_it_ctl.cur_it) &&
5946             (sctp_it_ctl.cur_it->vn == curvnet)) {
5947                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5948         }
5949         SCTP_ITERATOR_UNLOCK();
5950         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5951         SCTP_WQ_ADDR_LOCK();
5952         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5953                 LIST_REMOVE(wi, sctp_nxt_addr);
5954                 SCTP_DECR_LADDR_COUNT();
5955                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5956                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5957                 }
5958                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5959         }
5960         SCTP_WQ_ADDR_UNLOCK();
5961
5962         /*
5963          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5964          * destroyed first).
5965          */
5966         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5967         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5968                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5969                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5970                                 /* free the ifa */
5971                                 LIST_REMOVE(ifa, next_bucket);
5972                                 LIST_REMOVE(ifa, next_ifa);
5973                                 SCTP_FREE(ifa, SCTP_M_IFA);
5974                         }
5975                         /* free the ifn */
5976                         LIST_REMOVE(ifn, next_bucket);
5977                         LIST_REMOVE(ifn, next_ifn);
5978                         SCTP_FREE(ifn, SCTP_M_IFN);
5979                 }
5980                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5981                 /* free the vrf */
5982                 LIST_REMOVE(vrf, next_vrf);
5983                 SCTP_FREE(vrf, SCTP_M_VRF);
5984         }
5985         /* free the vrf hashes */
5986         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5987         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5988
5989         /*
5990          * free the TIMEWAIT list elements malloc'd in the function
5991          * sctp_add_vtag_to_timewait()...
5992          */
5993         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5994                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5995                 if (!LIST_EMPTY(chain)) {
5996                         prev_twait_block = NULL;
5997                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5998                                 if (prev_twait_block) {
5999                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6000                                 }
6001                                 prev_twait_block = twait_block;
6002                         }
6003                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6004                 }
6005         }
6006
6007         /* free the locks and mutexes */
6008 #ifdef SCTP_PACKET_LOGGING
6009         SCTP_IP_PKTLOG_DESTROY();
6010 #endif
6011         SCTP_IPI_ADDR_DESTROY();
6012         SCTP_STATLOG_DESTROY();
6013         SCTP_INP_INFO_LOCK_DESTROY();
6014
6015         SCTP_WQ_ADDR_DESTROY();
6016
6017         /* Get rid of other stuff too. */
6018         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6019                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6020         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6021                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6022         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6023                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6024
6025         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6026         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6027         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6028         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6029         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6030         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6031         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6032         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6033         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6034 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6035         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6036 #endif
6037 }
6038
6039
6040 int
6041 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6042     int offset, int limit,
6043     struct sockaddr *src, struct sockaddr *dst,
6044     struct sockaddr *altsa, uint16_t port)
6045 {
6046         /*
6047          * grub through the INIT pulling addresses and loading them to the
6048          * nets structure in the asoc. The from address in the mbuf should
6049          * also be loaded (if it is not already). This routine can be called
6050          * with either INIT or INIT-ACK's as long as the m points to the IP
6051          * packet and the offset points to the beginning of the parameters.
6052          */
6053         struct sctp_inpcb *inp;
6054         struct sctp_nets *net, *nnet, *net_tmp;
6055         struct sctp_paramhdr *phdr, parm_buf;
6056         struct sctp_tcb *stcb_tmp;
6057         uint16_t ptype, plen;
6058         struct sockaddr *sa;
6059         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6060         struct sctp_auth_random *p_random = NULL;
6061         uint16_t random_len = 0;
6062         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6063         struct sctp_auth_hmac_algo *hmacs = NULL;
6064         uint16_t hmacs_len = 0;
6065         uint8_t saw_asconf = 0;
6066         uint8_t saw_asconf_ack = 0;
6067         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6068         struct sctp_auth_chunk_list *chunks = NULL;
6069         uint16_t num_chunks = 0;
6070         sctp_key_t *new_key;
6071         uint32_t keylen;
6072         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6073         uint8_t peer_supports_ecn;
6074         uint8_t peer_supports_prsctp;
6075         uint8_t peer_supports_auth;
6076         uint8_t peer_supports_asconf;
6077         uint8_t peer_supports_asconf_ack;
6078         uint8_t peer_supports_reconfig;
6079         uint8_t peer_supports_nrsack;
6080         uint8_t peer_supports_pktdrop;
6081         uint8_t peer_supports_idata;
6082 #ifdef INET
6083         struct sockaddr_in sin;
6084 #endif
6085 #ifdef INET6
6086         struct sockaddr_in6 sin6;
6087 #endif
6088
6089         /* First get the destination address setup too. */
6090 #ifdef INET
6091         memset(&sin, 0, sizeof(sin));
6092         sin.sin_family = AF_INET;
6093         sin.sin_len = sizeof(sin);
6094         sin.sin_port = stcb->rport;
6095 #endif
6096 #ifdef INET6
6097         memset(&sin6, 0, sizeof(sin6));
6098         sin6.sin6_family = AF_INET6;
6099         sin6.sin6_len = sizeof(struct sockaddr_in6);
6100         sin6.sin6_port = stcb->rport;
6101 #endif
6102         if (altsa) {
6103                 sa = altsa;
6104         } else {
6105                 sa = src;
6106         }
6107         peer_supports_idata = 0;
6108         peer_supports_ecn = 0;
6109         peer_supports_prsctp = 0;
6110         peer_supports_auth = 0;
6111         peer_supports_asconf = 0;
6112         peer_supports_reconfig = 0;
6113         peer_supports_nrsack = 0;
6114         peer_supports_pktdrop = 0;
6115         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6116                 /* mark all addresses that we have currently on the list */
6117                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6118         }
6119         /* does the source address already exist? if so skip it */
6120         inp = stcb->sctp_ep;
6121         atomic_add_int(&stcb->asoc.refcnt, 1);
6122         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6123         atomic_add_int(&stcb->asoc.refcnt, -1);
6124
6125         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6126                 /* we must add the source address */
6127                 /* no scope set here since we have a tcb already. */
6128                 switch (sa->sa_family) {
6129 #ifdef INET
6130                 case AF_INET:
6131                         if (stcb->asoc.scope.ipv4_addr_legal) {
6132                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6133                                         return (-1);
6134                                 }
6135                         }
6136                         break;
6137 #endif
6138 #ifdef INET6
6139                 case AF_INET6:
6140                         if (stcb->asoc.scope.ipv6_addr_legal) {
6141                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6142                                         return (-2);
6143                                 }
6144                         }
6145                         break;
6146 #endif
6147                 default:
6148                         break;
6149                 }
6150         } else {
6151                 if (net_tmp != NULL && stcb_tmp == stcb) {
6152                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6153                 } else if (stcb_tmp != stcb) {
6154                         /* It belongs to another association? */
6155                         if (stcb_tmp)
6156                                 SCTP_TCB_UNLOCK(stcb_tmp);
6157                         return (-3);
6158                 }
6159         }
6160         if (stcb->asoc.state == 0) {
6161                 /* the assoc was freed? */
6162                 return (-4);
6163         }
6164         /* now we must go through each of the params. */
6165         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6166         while (phdr) {
6167                 ptype = ntohs(phdr->param_type);
6168                 plen = ntohs(phdr->param_length);
6169                 /*
6170                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6171                  * (uint32_t)ptype, (int)plen);
6172                  */
6173                 if (offset + plen > limit) {
6174                         break;
6175                 }
6176                 if (plen == 0) {
6177                         break;
6178                 }
6179 #ifdef INET
6180                 if (ptype == SCTP_IPV4_ADDRESS) {
6181                         if (stcb->asoc.scope.ipv4_addr_legal) {
6182                                 struct sctp_ipv4addr_param *p4, p4_buf;
6183
6184                                 /* ok get the v4 address and check/add */
6185                                 phdr = sctp_get_next_param(m, offset,
6186                                     (struct sctp_paramhdr *)&p4_buf,
6187                                     sizeof(p4_buf));
6188                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6189                                     phdr == NULL) {
6190                                         return (-5);
6191                                 }
6192                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6193                                 sin.sin_addr.s_addr = p4->addr;
6194                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6195                                         /* Skip multi-cast addresses */
6196                                         goto next_param;
6197                                 }
6198                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6199                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6200                                         goto next_param;
6201                                 }
6202                                 sa = (struct sockaddr *)&sin;
6203                                 inp = stcb->sctp_ep;
6204                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6205                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6206                                     dst, stcb);
6207                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6208
6209                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6210                                     inp == NULL) {
6211                                         /* we must add the source address */
6212                                         /*
6213                                          * no scope set since we have a tcb
6214                                          * already
6215                                          */
6216
6217                                         /*
6218                                          * we must validate the state again
6219                                          * here
6220                                          */
6221                         add_it_now:
6222                                         if (stcb->asoc.state == 0) {
6223                                                 /* the assoc was freed? */
6224                                                 return (-7);
6225                                         }
6226                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6227                                                 return (-8);
6228                                         }
6229                                 } else if (stcb_tmp == stcb) {
6230                                         if (stcb->asoc.state == 0) {
6231                                                 /* the assoc was freed? */
6232                                                 return (-10);
6233                                         }
6234                                         if (net != NULL) {
6235                                                 /* clear flag */
6236                                                 net->dest_state &=
6237                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6238                                         }
6239                                 } else {
6240                                         /*
6241                                          * strange, address is in another
6242                                          * assoc? straighten out locks.
6243                                          */
6244                                         if (stcb_tmp) {
6245                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6246                                                         struct mbuf *op_err;
6247                                                         char msg[SCTP_DIAG_INFO_LEN];
6248
6249                                                         /*
6250                                                          * in setup state we
6251                                                          * abort this guy
6252                                                          */
6253                                                         snprintf(msg, sizeof(msg),
6254                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6255                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6256                                                             msg);
6257                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6258                                                             stcb_tmp, op_err,
6259                                                             SCTP_SO_NOT_LOCKED);
6260                                                         goto add_it_now;
6261                                                 }
6262                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6263                                         }
6264                                         if (stcb->asoc.state == 0) {
6265                                                 /* the assoc was freed? */
6266                                                 return (-12);
6267                                         }
6268                                         return (-13);
6269                                 }
6270                         }
6271                 } else
6272 #endif
6273 #ifdef INET6
6274                 if (ptype == SCTP_IPV6_ADDRESS) {
6275                         if (stcb->asoc.scope.ipv6_addr_legal) {
6276                                 /* ok get the v6 address and check/add */
6277                                 struct sctp_ipv6addr_param *p6, p6_buf;
6278
6279                                 phdr = sctp_get_next_param(m, offset,
6280                                     (struct sctp_paramhdr *)&p6_buf,
6281                                     sizeof(p6_buf));
6282                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6283                                     phdr == NULL) {
6284                                         return (-14);
6285                                 }
6286                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6287                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6288                                     sizeof(p6->addr));
6289                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6290                                         /* Skip multi-cast addresses */
6291                                         goto next_param;
6292                                 }
6293                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6294                                         /*
6295                                          * Link local make no sense without
6296                                          * scope
6297                                          */
6298                                         goto next_param;
6299                                 }
6300                                 sa = (struct sockaddr *)&sin6;
6301                                 inp = stcb->sctp_ep;
6302                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6303                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6304                                     dst, stcb);
6305                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6306                                 if (stcb_tmp == NULL &&
6307                                     (inp == stcb->sctp_ep || inp == NULL)) {
6308                                         /*
6309                                          * we must validate the state again
6310                                          * here
6311                                          */
6312                         add_it_now6:
6313                                         if (stcb->asoc.state == 0) {
6314                                                 /* the assoc was freed? */
6315                                                 return (-16);
6316                                         }
6317                                         /*
6318                                          * we must add the address, no scope
6319                                          * set
6320                                          */
6321                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6322                                                 return (-17);
6323                                         }
6324                                 } else if (stcb_tmp == stcb) {
6325                                         /*
6326                                          * we must validate the state again
6327                                          * here
6328                                          */
6329                                         if (stcb->asoc.state == 0) {
6330                                                 /* the assoc was freed? */
6331                                                 return (-19);
6332                                         }
6333                                         if (net != NULL) {
6334                                                 /* clear flag */
6335                                                 net->dest_state &=
6336                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6337                                         }
6338                                 } else {
6339                                         /*
6340                                          * strange, address is in another
6341                                          * assoc? straighten out locks.
6342                                          */
6343                                         if (stcb_tmp) {
6344                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6345                                                         struct mbuf *op_err;
6346                                                         char msg[SCTP_DIAG_INFO_LEN];
6347
6348                                                         /*
6349                                                          * in setup state we
6350                                                          * abort this guy
6351                                                          */
6352                                                         snprintf(msg, sizeof(msg),
6353                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6354                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6355                                                             msg);
6356                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6357                                                             stcb_tmp, op_err,
6358                                                             SCTP_SO_NOT_LOCKED);
6359                                                         goto add_it_now6;
6360                                                 }
6361                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6362                                         }
6363                                         if (stcb->asoc.state == 0) {
6364                                                 /* the assoc was freed? */
6365                                                 return (-21);
6366                                         }
6367                                         return (-22);
6368                                 }
6369                         }
6370                 } else
6371 #endif
6372                 if (ptype == SCTP_ECN_CAPABLE) {
6373                         peer_supports_ecn = 1;
6374                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6375                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6376                                 struct sctp_adaptation_layer_indication ai,
6377                                                                 *aip;
6378
6379                                 phdr = sctp_get_next_param(m, offset,
6380                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6381                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6382                                 if (aip) {
6383                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6384                                         stcb->asoc.adaptation_needed = 1;
6385                                 }
6386                         }
6387                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6388                         struct sctp_asconf_addr_param lstore, *fee;
6389                         int lptype;
6390                         struct sockaddr *lsa = NULL;
6391 #ifdef INET
6392                         struct sctp_asconf_addrv4_param *fii;
6393 #endif
6394
6395                         if (stcb->asoc.asconf_supported == 0) {
6396                                 return (-100);
6397                         }
6398                         if (plen > sizeof(lstore)) {
6399                                 return (-23);
6400                         }
6401                         phdr = sctp_get_next_param(m, offset,
6402                             (struct sctp_paramhdr *)&lstore,
6403                             min(plen, sizeof(lstore)));
6404                         if (phdr == NULL) {
6405                                 return (-24);
6406                         }
6407                         fee = (struct sctp_asconf_addr_param *)phdr;
6408                         lptype = ntohs(fee->addrp.ph.param_type);
6409                         switch (lptype) {
6410 #ifdef INET
6411                         case SCTP_IPV4_ADDRESS:
6412                                 if (plen !=
6413                                     sizeof(struct sctp_asconf_addrv4_param)) {
6414                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6415                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6416                                             plen);
6417                                 } else {
6418                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6419                                         sin.sin_addr.s_addr = fii->addrp.addr;
6420                                         lsa = (struct sockaddr *)&sin;
6421                                 }
6422                                 break;
6423 #endif
6424 #ifdef INET6
6425                         case SCTP_IPV6_ADDRESS:
6426                                 if (plen !=
6427                                     sizeof(struct sctp_asconf_addr_param)) {
6428                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6429                                             (int)sizeof(struct sctp_asconf_addr_param),
6430                                             plen);
6431                                 } else {
6432                                         memcpy(sin6.sin6_addr.s6_addr,
6433                                             fee->addrp.addr,
6434                                             sizeof(fee->addrp.addr));
6435                                         lsa = (struct sockaddr *)&sin6;
6436                                 }
6437                                 break;
6438 #endif
6439                         default:
6440                                 break;
6441                         }
6442                         if (lsa) {
6443                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6444                         }
6445                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6446                         stcb->asoc.peer_supports_nat = 1;
6447                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6448                         /* Peer supports pr-sctp */
6449                         peer_supports_prsctp = 1;
6450                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6451                         /* A supported extension chunk */
6452                         struct sctp_supported_chunk_types_param *pr_supported;
6453                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6454                         int num_ent, i;
6455
6456                         phdr = sctp_get_next_param(m, offset,
6457                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6458                         if (phdr == NULL) {
6459                                 return (-25);
6460                         }
6461                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6462                         num_ent = plen - sizeof(struct sctp_paramhdr);
6463                         for (i = 0; i < num_ent; i++) {
6464                                 switch (pr_supported->chunk_types[i]) {
6465                                 case SCTP_ASCONF:
6466                                         peer_supports_asconf = 1;
6467                                         break;
6468                                 case SCTP_ASCONF_ACK:
6469                                         peer_supports_asconf_ack = 1;
6470                                         break;
6471                                 case SCTP_FORWARD_CUM_TSN:
6472                                         peer_supports_prsctp = 1;
6473                                         break;
6474                                 case SCTP_PACKET_DROPPED:
6475                                         peer_supports_pktdrop = 1;
6476                                         break;
6477                                 case SCTP_NR_SELECTIVE_ACK:
6478                                         peer_supports_nrsack = 1;
6479                                         break;
6480                                 case SCTP_STREAM_RESET:
6481                                         peer_supports_reconfig = 1;
6482                                         break;
6483                                 case SCTP_AUTHENTICATION:
6484                                         peer_supports_auth = 1;
6485                                         break;
6486                                 case SCTP_IDATA:
6487                                         peer_supports_idata = 1;
6488                                         break;
6489                                 default:
6490                                         /* one I have not learned yet */
6491                                         break;
6492
6493                                 }
6494                         }
6495                 } else if (ptype == SCTP_RANDOM) {
6496                         if (plen > sizeof(random_store))
6497                                 break;
6498                         if (got_random) {
6499                                 /* already processed a RANDOM */
6500                                 goto next_param;
6501                         }
6502                         phdr = sctp_get_next_param(m, offset,
6503                             (struct sctp_paramhdr *)random_store,
6504                             min(sizeof(random_store), plen));
6505                         if (phdr == NULL)
6506                                 return (-26);
6507                         p_random = (struct sctp_auth_random *)phdr;
6508                         random_len = plen - sizeof(*p_random);
6509                         /* enforce the random length */
6510                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6511                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6512                                 return (-27);
6513                         }
6514                         got_random = 1;
6515                 } else if (ptype == SCTP_HMAC_LIST) {
6516                         uint16_t num_hmacs;
6517                         uint16_t i;
6518
6519                         if (plen > sizeof(hmacs_store))
6520                                 break;
6521                         if (got_hmacs) {
6522                                 /* already processed a HMAC list */
6523                                 goto next_param;
6524                         }
6525                         phdr = sctp_get_next_param(m, offset,
6526                             (struct sctp_paramhdr *)hmacs_store,
6527                             min(plen, sizeof(hmacs_store)));
6528                         if (phdr == NULL)
6529                                 return (-28);
6530                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6531                         hmacs_len = plen - sizeof(*hmacs);
6532                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6533                         /* validate the hmac list */
6534                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6535                                 return (-29);
6536                         }
6537                         if (stcb->asoc.peer_hmacs != NULL)
6538                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6539                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6540                         if (stcb->asoc.peer_hmacs != NULL) {
6541                                 for (i = 0; i < num_hmacs; i++) {
6542                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6543                                             ntohs(hmacs->hmac_ids[i]));
6544                                 }
6545                         }
6546                         got_hmacs = 1;
6547                 } else if (ptype == SCTP_CHUNK_LIST) {
6548                         int i;
6549
6550                         if (plen > sizeof(chunks_store))
6551                                 break;
6552                         if (got_chklist) {
6553                                 /* already processed a Chunks list */
6554                                 goto next_param;
6555                         }
6556                         phdr = sctp_get_next_param(m, offset,
6557                             (struct sctp_paramhdr *)chunks_store,
6558                             min(plen, sizeof(chunks_store)));
6559                         if (phdr == NULL)
6560                                 return (-30);
6561                         chunks = (struct sctp_auth_chunk_list *)phdr;
6562                         num_chunks = plen - sizeof(*chunks);
6563                         if (stcb->asoc.peer_auth_chunks != NULL)
6564                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6565                         else
6566                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6567                         for (i = 0; i < num_chunks; i++) {
6568                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6569                                     stcb->asoc.peer_auth_chunks);
6570                                 /* record asconf/asconf-ack if listed */
6571                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6572                                         saw_asconf = 1;
6573                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6574                                         saw_asconf_ack = 1;
6575
6576                         }
6577                         got_chklist = 1;
6578                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6579                             (ptype == SCTP_STATE_COOKIE) ||
6580                             (ptype == SCTP_UNRECOG_PARAM) ||
6581                             (ptype == SCTP_COOKIE_PRESERVE) ||
6582                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6583                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6584                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6585                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6586                     (ptype == SCTP_SUCCESS_REPORT)) {
6587                          /* don't care */ ;
6588                 } else {
6589                         if ((ptype & 0x8000) == 0x0000) {
6590                                 /*
6591                                  * must stop processing the rest of the
6592                                  * param's. Any report bits were handled
6593                                  * with the call to
6594                                  * sctp_arethere_unrecognized_parameters()
6595                                  * when the INIT or INIT-ACK was first seen.
6596                                  */
6597                                 break;
6598                         }
6599                 }
6600
6601 next_param:
6602                 offset += SCTP_SIZE32(plen);
6603                 if (offset >= limit) {
6604                         break;
6605                 }
6606                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6607                     sizeof(parm_buf));
6608         }
6609         /* Now check to see if we need to purge any addresses */
6610         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6611                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6612                     SCTP_ADDR_NOT_IN_ASSOC) {
6613                         /* This address has been removed from the asoc */
6614                         /* remove and free it */
6615                         stcb->asoc.numnets--;
6616                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6617                         sctp_free_remote_addr(net);
6618                         if (net == stcb->asoc.primary_destination) {
6619                                 stcb->asoc.primary_destination = NULL;
6620                                 sctp_select_primary_destination(stcb);
6621                         }
6622                 }
6623         }
6624         if ((stcb->asoc.ecn_supported == 1) &&
6625             (peer_supports_ecn == 0)) {
6626                 stcb->asoc.ecn_supported = 0;
6627         }
6628         if ((stcb->asoc.prsctp_supported == 1) &&
6629             (peer_supports_prsctp == 0)) {
6630                 stcb->asoc.prsctp_supported = 0;
6631         }
6632         if ((stcb->asoc.auth_supported == 1) &&
6633             ((peer_supports_auth == 0) ||
6634             (got_random == 0) || (got_hmacs == 0))) {
6635                 stcb->asoc.auth_supported = 0;
6636         }
6637         if ((stcb->asoc.asconf_supported == 1) &&
6638             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6639             (stcb->asoc.auth_supported == 0) ||
6640             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6641                 stcb->asoc.asconf_supported = 0;
6642         }
6643         if ((stcb->asoc.reconfig_supported == 1) &&
6644             (peer_supports_reconfig == 0)) {
6645                 stcb->asoc.reconfig_supported = 0;
6646         }
6647         if ((stcb->asoc.idata_supported == 1) &&
6648             (peer_supports_idata == 0)) {
6649                 stcb->asoc.idata_supported = 0;
6650         }
6651         if ((stcb->asoc.nrsack_supported == 1) &&
6652             (peer_supports_nrsack == 0)) {
6653                 stcb->asoc.nrsack_supported = 0;
6654         }
6655         if ((stcb->asoc.pktdrop_supported == 1) &&
6656             (peer_supports_pktdrop == 0)) {
6657                 stcb->asoc.pktdrop_supported = 0;
6658         }
6659         /* validate authentication required parameters */
6660         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6661                 /* peer does not support auth but sent a chunks list? */
6662                 return (-31);
6663         }
6664         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6665                 /* peer supports asconf but not auth? */
6666                 return (-32);
6667         } else if ((peer_supports_asconf == 1) &&
6668                     (peer_supports_auth == 1) &&
6669             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6670                 return (-33);
6671         }
6672         /* concatenate the full random key */
6673         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6674         if (chunks != NULL) {
6675                 keylen += sizeof(*chunks) + num_chunks;
6676         }
6677         new_key = sctp_alloc_key(keylen);
6678         if (new_key != NULL) {
6679                 /* copy in the RANDOM */
6680                 if (p_random != NULL) {
6681                         keylen = sizeof(*p_random) + random_len;
6682                         bcopy(p_random, new_key->key, keylen);
6683                 }
6684                 /* append in the AUTH chunks */
6685                 if (chunks != NULL) {
6686                         bcopy(chunks, new_key->key + keylen,
6687                             sizeof(*chunks) + num_chunks);
6688                         keylen += sizeof(*chunks) + num_chunks;
6689                 }
6690                 /* append in the HMACs */
6691                 if (hmacs != NULL) {
6692                         bcopy(hmacs, new_key->key + keylen,
6693                             sizeof(*hmacs) + hmacs_len);
6694                 }
6695         } else {
6696                 /* failed to get memory for the key */
6697                 return (-34);
6698         }
6699         if (stcb->asoc.authinfo.peer_random != NULL)
6700                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6701         stcb->asoc.authinfo.peer_random = new_key;
6702         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6703         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6704
6705         return (0);
6706 }
6707
6708 int
6709 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6710     struct sctp_nets *net)
6711 {
6712         /* make sure the requested primary address exists in the assoc */
6713         if (net == NULL && sa)
6714                 net = sctp_findnet(stcb, sa);
6715
6716         if (net == NULL) {
6717                 /* didn't find the requested primary address! */
6718                 return (-1);
6719         } else {
6720                 /* set the primary address */
6721                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6722                         /* Must be confirmed, so queue to set */
6723                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6724                         return (0);
6725                 }
6726                 stcb->asoc.primary_destination = net;
6727                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6728                         sctp_free_remote_addr(stcb->asoc.alternate);
6729                         stcb->asoc.alternate = NULL;
6730                 }
6731                 net = TAILQ_FIRST(&stcb->asoc.nets);
6732                 if (net != stcb->asoc.primary_destination) {
6733                         /*
6734                          * first one on the list is NOT the primary
6735                          * sctp_cmpaddr() is much more efficient if the
6736                          * primary is the first on the list, make it so.
6737                          */
6738                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6739                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6740                 }
6741                 return (0);
6742         }
6743 }
6744
6745 int
6746 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6747 {
6748         /*
6749          * This function serves two purposes. It will see if a TAG can be
6750          * re-used and return 1 for yes it is ok and 0 for don't use that
6751          * tag. A secondary function it will do is purge out old tags that
6752          * can be removed.
6753          */
6754         struct sctpvtaghead *chain;
6755         struct sctp_tagblock *twait_block;
6756         struct sctpasochead *head;
6757         struct sctp_tcb *stcb;
6758         int i;
6759
6760         SCTP_INP_INFO_RLOCK();
6761         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6762             SCTP_BASE_INFO(hashasocmark))];
6763         LIST_FOREACH(stcb, head, sctp_asocs) {
6764                 /*
6765                  * We choose not to lock anything here. TCB's can't be
6766                  * removed since we have the read lock, so they can't be
6767                  * freed on us, same thing for the INP. I may be wrong with
6768                  * this assumption, but we will go with it for now :-)
6769                  */
6770                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6771                         continue;
6772                 }
6773                 if (stcb->asoc.my_vtag == tag) {
6774                         /* candidate */
6775                         if (stcb->rport != rport) {
6776                                 continue;
6777                         }
6778                         if (stcb->sctp_ep->sctp_lport != lport) {
6779                                 continue;
6780                         }
6781                         /* Its a used tag set */
6782                         SCTP_INP_INFO_RUNLOCK();
6783                         return (0);
6784                 }
6785         }
6786         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6787         /* Now what about timed wait ? */
6788         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6789                 /*
6790                  * Block(s) are present, lets see if we have this tag in the
6791                  * list
6792                  */
6793                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6794                         if (twait_block->vtag_block[i].v_tag == 0) {
6795                                 /* not used */
6796                                 continue;
6797                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6798                             now->tv_sec) {
6799                                 /* Audit expires this guy */
6800                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6801                                 twait_block->vtag_block[i].v_tag = 0;
6802                                 twait_block->vtag_block[i].lport = 0;
6803                                 twait_block->vtag_block[i].rport = 0;
6804                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6805                                     (twait_block->vtag_block[i].lport == lport) &&
6806                             (twait_block->vtag_block[i].rport == rport)) {
6807                                 /* Bad tag, sorry :< */
6808                                 SCTP_INP_INFO_RUNLOCK();
6809                                 return (0);
6810                         }
6811                 }
6812         }
6813         SCTP_INP_INFO_RUNLOCK();
6814         return (1);
6815 }
6816
6817 static void
6818 sctp_drain_mbufs(struct sctp_tcb *stcb)
6819 {
6820         /*
6821          * We must hunt this association for MBUF's past the cumack (i.e.
6822          * out of order data that we can renege on).
6823          */
6824         struct sctp_association *asoc;
6825         struct sctp_tmit_chunk *chk, *nchk;
6826         uint32_t cumulative_tsn_p1;
6827         struct sctp_queued_to_read *ctl, *nctl;
6828         int cnt, strmat;
6829         uint32_t gap, i;
6830         int fnd = 0;
6831
6832         /* We look for anything larger than the cum-ack + 1 */
6833
6834         asoc = &stcb->asoc;
6835         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6836                 /* none we can reneg on. */
6837                 return;
6838         }
6839         SCTP_STAT_INCR(sctps_protocol_drains_done);
6840         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6841         cnt = 0;
6842         /* Ok that was fun, now we will drain all the inbound streams? */
6843         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6844                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next_instrm, nctl) {
6845 #ifdef INVARIANTS
6846                         if (ctl->on_strm_q != SCTP_ON_ORDERED) {
6847                                 panic("Huh control: %p on_q: %d -- not ordered?",
6848                                     ctl, ctl->on_strm_q);
6849                         }
6850 #endif
6851                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6852                                 /* Yep it is above cum-ack */
6853                                 cnt++;
6854                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6855                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6856                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6857                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6858                                 if (ctl->on_read_q) {
6859                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next);
6860                                         ctl->on_read_q = 0;
6861                                 }
6862                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next_instrm);
6863                                 ctl->on_strm_q = 0;
6864                                 if (ctl->data) {
6865                                         sctp_m_freem(ctl->data);
6866                                         ctl->data = NULL;
6867                                 }
6868                                 sctp_free_remote_addr(ctl->whoFrom);
6869                                 /* Now its reasm? */
6870                                 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
6871                                         cnt++;
6872                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6873                                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6874                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6875                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6876                                         TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
6877                                         if (chk->data) {
6878                                                 sctp_m_freem(chk->data);
6879                                                 chk->data = NULL;
6880                                         }
6881                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6882                                 }
6883                                 sctp_free_a_readq(stcb, ctl);
6884                         }
6885                 }
6886                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].uno_inqueue, next_instrm, nctl) {
6887 #ifdef INVARIANTS
6888                         if (ctl->on_strm_q != SCTP_ON_UNORDERED) {
6889                                 panic("Huh control: %p on_q: %d -- not unordered?",
6890                                     ctl, ctl->on_strm_q);
6891                         }
6892 #endif
6893                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6894                                 /* Yep it is above cum-ack */
6895                                 cnt++;
6896                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6897                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6898                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6899                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6900                                 if (ctl->on_read_q) {
6901                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next);
6902                                         ctl->on_read_q = 0;
6903                                 }
6904                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, ctl, next_instrm);
6905                                 ctl->on_strm_q = 0;
6906                                 if (ctl->data) {
6907                                         sctp_m_freem(ctl->data);
6908                                         ctl->data = NULL;
6909                                 }
6910                                 sctp_free_remote_addr(ctl->whoFrom);
6911                                 /* Now its reasm? */
6912                                 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
6913                                         cnt++;
6914                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6915                                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6916                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6917                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6918                                         TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
6919                                         if (chk->data) {
6920                                                 sctp_m_freem(chk->data);
6921                                                 chk->data = NULL;
6922                                         }
6923                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6924                                 }
6925                                 sctp_free_a_readq(stcb, ctl);
6926                         }
6927                 }
6928         }
6929         if (cnt) {
6930                 /* We must back down to see what the new highest is */
6931                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6932                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6933                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6934                                 asoc->highest_tsn_inside_map = i;
6935                                 fnd = 1;
6936                                 break;
6937                         }
6938                 }
6939                 if (!fnd) {
6940                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6941                 }
6942                 /*
6943                  * Question, should we go through the delivery queue? The
6944                  * only reason things are on here is the app not reading OR
6945                  * a p-d-api up. An attacker COULD send enough in to
6946                  * initiate the PD-API and then send a bunch of stuff to
6947                  * other streams... these would wind up on the delivery
6948                  * queue.. and then we would not get to them. But in order
6949                  * to do this I then have to back-track and un-deliver
6950                  * sequence numbers in streams.. el-yucko. I think for now
6951                  * we will NOT look at the delivery queue and leave it to be
6952                  * something to consider later. An alternative would be to
6953                  * abort the P-D-API with a notification and then deliver
6954                  * the data.... Or another method might be to keep track of
6955                  * how many times the situation occurs and if we see a
6956                  * possible attack underway just abort the association.
6957                  */
6958 #ifdef SCTP_DEBUG
6959                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6960 #endif
6961                 /*
6962                  * Now do we need to find a new
6963                  * asoc->highest_tsn_inside_map?
6964                  */
6965                 asoc->last_revoke_count = cnt;
6966                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6967                 /* sa_ignore NO_NULL_CHK */
6968                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6969                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6970         }
6971         /*
6972          * Another issue, in un-setting the TSN's in the mapping array we
6973          * DID NOT adjust the highest_tsn marker.  This will cause one of
6974          * two things to occur. It may cause us to do extra work in checking
6975          * for our mapping array movement. More importantly it may cause us
6976          * to SACK every datagram. This may not be a bad thing though since
6977          * we will recover once we get our cum-ack above and all this stuff
6978          * we dumped recovered.
6979          */
6980 }
6981
6982 void
6983 sctp_drain()
6984 {
6985         /*
6986          * We must walk the PCB lists for ALL associations here. The system
6987          * is LOW on MBUF's and needs help. This is where reneging will
6988          * occur. We really hope this does NOT happen!
6989          */
6990         VNET_ITERATOR_DECL(vnet_iter);
6991         VNET_LIST_RLOCK_NOSLEEP();
6992         VNET_FOREACH(vnet_iter) {
6993                 CURVNET_SET(vnet_iter);
6994                 struct sctp_inpcb *inp;
6995                 struct sctp_tcb *stcb;
6996
6997                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6998                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6999 #ifdef VIMAGE
7000                         continue;
7001 #else
7002                         return;
7003 #endif
7004                 }
7005                 SCTP_INP_INFO_RLOCK();
7006                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7007                         /* For each endpoint */
7008                         SCTP_INP_RLOCK(inp);
7009                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7010                                 /* For each association */
7011                                 SCTP_TCB_LOCK(stcb);
7012                                 sctp_drain_mbufs(stcb);
7013                                 SCTP_TCB_UNLOCK(stcb);
7014                         }
7015                         SCTP_INP_RUNLOCK(inp);
7016                 }
7017                 SCTP_INP_INFO_RUNLOCK();
7018                 CURVNET_RESTORE();
7019         }
7020         VNET_LIST_RUNLOCK_NOSLEEP();
7021 }
7022
7023 /*
7024  * start a new iterator
7025  * iterates through all endpoints and associations based on the pcb_state
7026  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7027  * assocs and "ef" (optional) is executed when the iterator completes.
7028  * "inpf" (optional) is executed for each new endpoint as it is being
7029  * iterated through. inpe (optional) is called when the inp completes
7030  * its way through all the stcbs.
7031  */
7032 int
7033 sctp_initiate_iterator(inp_func inpf,
7034     asoc_func af,
7035     inp_func inpe,
7036     uint32_t pcb_state,
7037     uint32_t pcb_features,
7038     uint32_t asoc_state,
7039     void *argp,
7040     uint32_t argi,
7041     end_func ef,
7042     struct sctp_inpcb *s_inp,
7043     uint8_t chunk_output_off)
7044 {
7045         struct sctp_iterator *it = NULL;
7046
7047         if (af == NULL) {
7048                 return (-1);
7049         }
7050         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7051                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7052                     SCTP_BASE_VAR(sctp_pcb_initialized));
7053                 return (-1);
7054         }
7055         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7056             SCTP_M_ITER);
7057         if (it == NULL) {
7058                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7059                 return (ENOMEM);
7060         }
7061         memset(it, 0, sizeof(*it));
7062         it->function_assoc = af;
7063         it->function_inp = inpf;
7064         if (inpf)
7065                 it->done_current_ep = 0;
7066         else
7067                 it->done_current_ep = 1;
7068         it->function_atend = ef;
7069         it->pointer = argp;
7070         it->val = argi;
7071         it->pcb_flags = pcb_state;
7072         it->pcb_features = pcb_features;
7073         it->asoc_state = asoc_state;
7074         it->function_inp_end = inpe;
7075         it->no_chunk_output = chunk_output_off;
7076         it->vn = curvnet;
7077         if (s_inp) {
7078                 /* Assume lock is held here */
7079                 it->inp = s_inp;
7080                 SCTP_INP_INCR_REF(it->inp);
7081                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7082         } else {
7083                 SCTP_INP_INFO_RLOCK();
7084                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7085                 if (it->inp) {
7086                         SCTP_INP_INCR_REF(it->inp);
7087                 }
7088                 SCTP_INP_INFO_RUNLOCK();
7089                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7090
7091         }
7092         SCTP_IPI_ITERATOR_WQ_LOCK();
7093         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7094                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7095                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7096                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7097                 SCTP_FREE(it, SCTP_M_ITER);
7098                 return (-1);
7099         }
7100         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7101         if (sctp_it_ctl.iterator_running == 0) {
7102                 sctp_wakeup_iterator();
7103         }
7104         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7105         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7106         return (0);
7107 }